JP4337334B2 - Image display device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a reflective image display device, and more particularly to an image display device using an image display medium that can be rewritten repeatedly by driving colored particles by an electric field.
[0002]
[Prior art]
Conventionally, as a so-called electronic paper that can be repeatedly rewritten, it is a memory-based image display technology such as rotating colored particles (Twisting Ball Display), electrophoresis, thermal rewritable, memory-related liquid crystal, electrochromy, etc. It has been known.
[0003]
In such a technique, an image display medium in which black particles and white particles charged with different polarities are enclosed between facing sheets is proposed as an image display medium that displays using particles (toner). Yes. Such an image display medium can display an image as the contrast between black particles and white particles by forming an electric field between sheets and moving the particles. In addition, a configuration in which a color filter is provided on the display substrate side of the image display medium is generally known in order to display a color image on an image display apparatus using an image display medium using such colored particles. However, there is a problem that the whiteness and the resolution of the monochrome image are lowered.
[0004]
For this reason, the inventors of the present invention disclosed in Patent Document 1 and Japanese Patent Application No. 2002-250214 and the like, provided with a colored portion having a color different from the color of the particles on the back substrate side, and collected the colored particles at a predetermined place to form the back substrate. In addition to the display by the color of the colored particles, the technique of performing the display by the color of the colored part of the back substrate was proposed.
[0005]
An example of such an image display device 100 is shown in FIG. As shown in FIG. 6A, the image display device 100 includes an image display medium 102 and a voltage application device 104. 6A and 6B, only one cell is shown as a part of the image display medium for the sake of simplicity. In the image display medium 102, black particles 110 and white particles 112 having different charging characteristics are enclosed between the display substrate 106 and the back substrate 108, and the substrates are partitioned by a partition member 114. A plurality of line-shaped display-side electrodes 116 are formed on the display substrate 106, and a plurality of line-shaped back-side electrodes 118R, 118G, and 118B are displayed on the back substrate 108 when the image display medium 102 is viewed in plan view. It is arranged in a direction orthogonal to the side electrode 116. That is, the electrode configuration of the image display medium 102 has a so-called passive matrix (simple matrix) structure. Colored portions 120R, 120G, and 120B colored red, green, and blue are formed on the back-side electrodes 118R, 118G, and 118B, respectively.
[0006]
When performing display using black particles 110 and white particles 112, the voltage application device 104, for example, has a predetermined DC voltage between the display side electrode 116 and the back side electrodes 118R, 118G, and 118B at the position where the particles are to be moved. Is applied to display black or white. On the other hand, for example, when displaying R (red) and B (blue), as shown in FIG. 6B, a multi-cycle alternating voltage 122 is applied to the display side electrode 116 and the back side electrodes 118R and 118B are applied. An alternating voltage 124 having the same frequency as that of the alternating voltage 122 and having a phase different by 180 ° is applied. At the same time, an alternating voltage 122 is applied to the back side electrode 120G so that an electric field is not formed on the colored portion 120G.
[0007]
As a result, an alternating electric field for moving particles in a direction parallel to the substrate surface is formed between the display-side electrode 116 and the back-side electrodes 118R and 118B. As shown in FIG. Particles on 120R and 120B are collected on the colored portion 120G, and R and B are displayed.
[0008]
7A, when displaying G (green) + B (blue) from the white display state, that is, when displaying colors by the adjacent colored portions 120G and 120B. As shown in B), an alternating voltage 122 is applied to the display-side electrode 116 and an alternating voltage 124 is applied to the back-side electrodes 118G and 118B. At the same time, an alternating voltage 122 is applied to the back side electrode 118R so that an electric field is not formed on the colored portion 120R.
[0009]
As a result, an alternating electric field for moving particles in a direction parallel to the substrate surface is formed between the display side electrode 116 and the back side electrodes 118G and 118B. As shown in FIG. Particles on 120G and 120B are collected on the colored portion 120G, and R and B are displayed.
[0010]
[Patent Document 1]
JP 2002-169191 A
[0011]
[Problems to be solved by the invention]
However, in the above prior art, when displaying colors by the adjacent colored portions 120G and 120B, it takes time for the particles on the colored portions 120R and 120B to move onto the colored portion 120R, resulting in a slow display speed. There was a problem. This is because, for example, when particles on the colored portion 120B move onto the colored portion 120G, an alternating electric field is also formed on the colored portion 120G, so that they collide with particles on the colored portion 120G and return to the colored portion 120B. This is because there are particles that are removed.
[0012]
The present invention has been made in view of the above problems, and an object of the present invention is to provide an image display device capable of suppressing a decrease in display speed when displaying a colored portion on the back substrate side. .
[0013]
[Means for Solving the Problems]
  In order to solve the above-mentioned problem, the invention according to claim 1 is a back surface provided with a display substrate having at least translucency, and at least three or more kinds of colored portions including colored portions that face the display substrate and are not adjacent to each other. At least one kind different from the color of the back substrate while being movably enclosed between the substrates by an electric field formed by a voltage applied between the substrate and the display substrate and the back substrate.ElectrificationParticles andA gap member that partitions the substrates into a plurality of cells so as to include the plurality of colored portions;An image display medium comprising:
  In the cellWhen displaying the color by the colored part of a plurality of adjacent sections among the plurality of sections divided into a plurality of sections corresponding to the colored section, the first adjacent section of the plurality of adjacent sectionsElectrificationFor moving particles in a direction parallel to a plane including the display substrateAlternating electric fieldBetween the substrates of the first adjacent sectionMove the charged particles to the second adjacent compartmentOf the second adjacent sectionElectrificationFor moving particles in the parallel directionAlternating electric fieldBetween the substrate of the first adjacent section and the second adjacent sectionFormationAnd a voltage applying means.
[0014]
  According to the present invention, the image display medium includes at least one kind of substrate between the display substrate and the back substrate that are arranged to face each other.ElectrificationThe particle group is encapsulated.ElectrificationThe particle group can move between the substrates by an electric field formed by a voltage applied between the substrates. Note that the display substrate has a light-transmitting property, and can be formed of, for example, a glass substrate that is transparent, translucent, or colored and transparent, or a dielectric such as an insulating resin. Also,ElectrificationAs the particles, insulating particles or conductive particles can be used.
[0015]
  The back substrate includes at least three or more types of colored portions including colored portions that are not adjacent to each other. When displaying the color of the colored portion, by moving the particles present in the section of the colored portion when the space between the substrates is partitioned corresponding to the colored portion to other compartments to expose the colored portion The color can be visually recognized from the display substrate side.
The gap member partitions the substrate into a plurality of cells so as to include the plurality of colored portions.
[0016]
  ElectrificationWhen there is one kind of particle group,ElectrificationAn image can be displayed with the contrast between the particles and the color of the back substrate. Multiple types with different colors and charging characteristicsElectrificationWhen using particle swarms, different typesElectrificationParticle contrast orElectrificationAn image can be displayed by the contrast between the particle group and the colored portion on the back substrate side.
[0017]
  The voltage application means isIn the cellWhen displaying the color by the colored part of a plurality of adjacent sections among the plurality of sections divided into a plurality of sections corresponding to the colored section, the first adjacent section of the plurality of adjacent sectionsElectrificationFor moving particles in a direction parallel to a plane including the display substrateAlternating electric fieldBetween the substrates of the first adjacent sectionMove the charged particles to the second adjacent compartmentOf the second adjacent sectionElectrificationFor moving particles in the parallel directionAlternating electric fieldBetween the substrate of the first adjacent section and the second adjacent sectionFormationDo
Corresponding to the colored part in the cellMultiple compartmentsOut of compartmentalizedWhen displaying the color by the coloring part of several adjacent divisions, the voltage for moving the particle group of the 1st adjacent division first among the several adjacent divisions in the direction parallel to the surface containing a display substrate is set to 1st. Apply between adjacent compartments. As a result, the first adjacent sectionElectrificationThe particle group moves to a second adjacent compartment adjacent to it. Thereafter, the voltage applying means is connected to the second adjacent section.ElectrificationA voltage for moving the particle group in the parallel direction is applied between the substrates of the first adjacent section and the second adjacent section. As a result, the second adjacent sectionElectrificationParticles move to the adjacent compartment. At this time, a voltage similar to the voltage applied between the substrates in the second adjacent section is also applied between the substrates in the first adjacent section.ElectrificationThe particles do not return to the first adjacent compartment. That is, the second adjacent sectionElectrificationThe particle group moves to another section different from the first adjacent section adjacent thereto.
[0018]
  For example, when displaying a color by three colored portions, in the same manner as described above, a section adjacent to the second adjacent section is also displayed.ElectrificationBetween the substrates of the first adjacent compartment, the second adjacent compartment, and the compartment adjacent to the second adjacent compartment so that the particle group moves to another compartment adjacent to the compartment.ElectrificationA voltage for moving the particle group in the parallel direction may be applied, and the same applies to the case of displaying colors by the four colored portions.
[0019]
  As described above, in the present invention, the first adjacent section and the second adjacent section from the beginning as in the prior art.ElectrificationA voltage to translate the particles is applied at the same time toElectrificationRather than trying to move the particles to other compartments at the same time,ElectrificationAfter moving the particles to the second adjacent compartment,ElectrificationMove particles to other compartments. That is,ElectrificationThe particles are moved between the substrates so that the particles move step by step.ElectrificationA voltage for moving the particles in the parallel direction is applied stepwise. Thereby, even when displaying the color by the several coloring part of an adjacent division, it can suppress that display speed becomes slow.
[0020]
Note that the display-side electrode and the back-side electrode provided on the display substrate side and the back substrate side for applying a voltage may have a so-called passive matrix structure or a so-called active matrix structure. Further, the display side electrode and the back side electrode may be provided on the opposing surfaces of the display substrate and the back substrate, respectively, or may be provided on the surface opposite to the opposing surface of the display substrate and the back substrate, that is, on the outer surface. It may be provided in the substrate, or may be provided separately outside the display substrate and the back substrate.
[0021]
  According to a second aspect of the present invention, there is provided a display substrate having at least translucency and at least three or more types facing the display substrate.DoubleIt has a number of colored partsIn addition, the colored portions of each color are arranged so as to be adjacent to the colored portions of all other types of colors.At least one kind different from the color of the back substrate is encapsulated movably between the back substrate and an electric field formed by a voltage applied between the display substrate and the back substrate.ElectrificationIn the case of displaying the color of the image display medium provided with a particle group and the colored portions of a plurality of adjacent sections among the plurality of sections divided between the substrates corresponding to the colored sections, Of adjacent compartmentsElectrificationFor moving particles in a direction parallel to a plane including the display substrateAlternating electric fieldBetween the substrates of the plurality of adjacent compartmentsFormationAnd a voltage applying means.
[0022]
  According to this invention, there are at least three types of back substrate.DoubleIt has a number of colored partsIn addition, the colored portions of each color are arranged so as to be adjacent to the colored portions of all other types of colors.. And the voltage application means, when displaying the color by the colored portion of the plurality of adjacent sections,ElectrificationFor moving particles in the parallel directionAlternating electric fieldBetween multiple adjacent compartment substratesFormationTo do. This makes it possible toElectrificationThe particles move to other compartments different from these compartments. in this way,The colored part of each color is the colored part of all other colorsBy placing each colored part so that it is adjacent, i.e. there are no non-adjacent colored parts,ElectrificationThe moving distance of the particle group can be shortened. Therefore, even when displaying colors by the plurality of colored portions on the back substrate side, it is possible to suppress a decrease in display speed.
[0023]
  According to a third aspect of the present invention, the voltage applying means includes theElectrificationWhen moving the particle group in a direction perpendicular to the parallel direction,ElectrificationApplying a voltage to form a DC electric field or an alternating electric field having a first predetermined number of cycles between the substrates at positions where the particles are to be moved,ElectrificationWhen moving the particle group in the parallel direction,ElectrificationA voltage for forming an alternating electric field having a second predetermined number of cycles larger than the first predetermined number of cycles is applied between the substrates at positions where the particle group is to be moved.
[0024]
  According to this invention,ElectrificationWhen moving in the direction perpendicular to the parallel direction of the particle group, that is, the direction between the substrates,ElectrificationA DC voltage or an alternating voltage is applied so that a DC electric field or an alternating electric field having a first predetermined number of cycles (several cycles) is formed between the substrates at positions where the particle group is to be moved. ThisElectrificationThe particles move to the display substrate side or the back substrate side. Also, if you want to display (expose) the color of the back substrate on the display substrate side,ElectrificationAn alternating voltage is applied so that an alternating electric field having a second predetermined number of cycles (multiple cycles) larger than the first predetermined number of cycles for moving the particle group in the parallel direction is formed. Thereby, in the section of the colored partElectrificationThe particle group moves to other compartments to expose the colored portion, and the color can be visually recognized from the display substrate side.
[0025]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0026]
FIG. 2 shows a cross-sectional view of the image display medium 12 according to the present embodiment. As shown in FIG. 2, the image display medium 12 includes a display substrate 14 on the image display side, and a back substrate 16 that faces the display substrate 14 and is arranged with a predetermined gap.
[0027]
The display substrate 14 has a configuration in which, for example, a plurality of line-shaped display-side electrodes 18 are formed on a substrate having visible light permeability, and can be configured using a glass substrate on which a so-called ITO electrode is formed.
[0028]
The back substrate 16 is formed of a plurality of line-shaped back electrodes 20R, 20G, and 20B on a substrate made of resin or the like, and the back electrodes 20R, 20G, and 20B (hereinafter, the back electrodes are representative). In this case, the colored portions 22R, 22G, and 22B colored red (R), green (G), and blue (B), respectively, are formed on the back side electrode 20 as an example. It becomes the composition. The back side electrodes 20R, 20G, and 20B and the colored portions 22R, 22G, and 22B have substantially the same shape.
[0029]
As shown in FIGS. 3A and 3B, the display-side electrode 18 and the back-side electrode 20 are disposed so as to be orthogonal to each other when viewed from above.
[0030]
In addition, the rear side electrodes 20R, 20G, and 20B may be colored without using the coloring portions 22R, 22G, and 22B independently, and the coloring portions 22R, 22G, and 22B may also be used.
[0031]
The display-side electrode 18 and the back-side electrode 20 may be formed on the surface opposite to the surface on the opposite side of the display substrate 14 and the back-side substrate 16, and are separately provided outside the display substrate 14 and the back-side substrate 16. You may arrange | position independently.
[0032]
Between the display substrate 14 and the back substrate 16, particle groups having different colors and charging characteristics, for example, positively charged black particles 24 and negatively charged white particles 26 are encapsulated as an example.
[0033]
Further, a gap member 28 made of, for example, a silicon sheet or the like is provided between the display substrate 14 and the back substrate 16, thereby maintaining a constant distance between the display substrate 14 and the back substrate 16. The substrate of the image display medium 12 is divided into a plurality of cells 30. Note that a region surrounded by a dotted line shown in FIGS. 3A and 3B corresponds to one cell 30.
[0034]
In the present embodiment, the plurality of line-shaped display side electrodes and the plurality of line-shaped back side electrodes are arranged so as to be orthogonal to each other when the image display medium is viewed in plan, and the voltage is sequentially applied to the back side electrodes. A passive matrix (simple matrix) method that forms an image for each line by applying a voltage to all the display-side electrodes of the pixels that should move particles on that line in synchronization with this However, the present invention is not limited to this, and a so-called active matrix method in which a voltage is applied independently for each pixel may be used. In this case, the display-side electrode 18 may be an isolated electrode independent for each colored portion, and the back-side electrode 20 may be the same solid electrode on the entire surface. Alternatively, the display-side electrode 18 may be the same solid electrode on the entire surface, and the back-side electrode 20 may be an isolated electrode that is independent for each colored portion.
[0035]
FIG. 1B shows an image display device 10 according to the present embodiment. FIG. 1A shows a plan view of the colored portions 22R, 22G, and 22B. In FIG. 1B, the image display medium 12 will be described with respect to one cell 30 for ease of description.
[0036]
As shown in FIG. 1B, the image display device 10 includes an image display medium 12 and a voltage application device 13.
[0037]
The voltage application device 13 is connected to the display-side electrode 18 through the conductive wiring 32 and is connected to the back-side electrode 20 through the conductive wiring 34. One cell 30 includes one display-side electrode 18 and three back-side electrodes 20R, 20G, and 20B. Accordingly, as shown in FIG. 1B, the display substrate 14 and the back substrate 16 are separated from each other by a plurality of partitions 36R, 36G, and 36B by the opposing display side electrode 18 and back side electrodes 20R, 20G, and 20B. The electric field can be formed independently in each compartment.
[0038]
When moving the white particles 26 to the display substrate 14 side, the voltage application device 13 displays a positive DC voltage equal to or higher than a threshold voltage at which particles start moving or an alternating voltage of several cycles (first predetermined cycle number). Applied to the side electrode 18. When an alternating voltage of several cycles (first predetermined cycle number) is applied, the last pulse voltage is set to be positive. As a result, the positively charged black particles 24 on the display substrate 14 side move to the back substrate 16 side due to the Coulomb force generated by the electric field formed between the substrates, and the negatively charged white particles 26 on the back substrate 16 side are displayed. Move to the substrate 14 side.
[0039]
On the other hand, when the black particles 24 are moved to the display substrate 14 side, the voltage applying device 13 applies a negative voltage (voltage whose absolute value is equal to or higher than the threshold voltage) equal to or lower than a threshold voltage at which the particles start moving. When an alternating voltage of several cycles (the first predetermined number of cycles) is applied, the last pulse voltage is set to be negative. Thus, the negatively charged white particles 26 on the display substrate 14 side move to the back substrate 16 side due to the Coulomb force generated by the electric field formed between the substrates, and the positively charged black particles 24 on the back substrate 16 side are displayed. Move to the substrate 14 side.
[0040]
In addition, when displaying the color of the colored portion, for example, green, the voltage application device 13 has a first gap between the central back-side electrode 20G shown in FIG. 1B and the display-side electrode 18 opposed thereto. An alternating voltage of multiple cycles (second predetermined number of cycles) greater than the predetermined number of cycles is applied. As a result, the black particles 24 and the white particles 26 in the section 36G reciprocate between the substrates. At this time, the black particles 24 and the white particles 26 in the section 36G spread toward the adjacent section 36R or section 36B. Moving. As a result, the particle density of the section 36G is reduced, the colored portion 22G is exposed, and green is visible from the display substrate 14 side.
[0041]
This is because when the black particles 24 and the white particles 26 are reciprocated between the substrates by the alternating electric field formed between the substrates, the particles collide with each other and the edge electric field formed between the adjacent backside electrodes, This is because particles are diffused and moved in a direction parallel to the substrate due to an electric field component in a direction parallel to the substrate.
[0042]
Similarly, when it is desired to display red, it is only necessary to apply a multi-cycle alternating voltage between the back side electrode 20R on the left side of FIG. 1B and the display side electrode 18, and to display blue. For this purpose, an alternating voltage of multiple cycles may be applied between the back side electrode 20B on the right side of FIG.
[0043]
Accordingly, the image display medium 12 can display black, white, green, red, blue, or a combination of these for each pixel.
[0044]
The black particles 24 and the white particles 26 correspond to the particle group of the present invention, and the voltage applying device 13 corresponds to the voltage applying means of the present invention.
[0045]
Next, a case where a color by two adjacent colored portions is displayed will be described. Hereinafter, a case where G (green) and B (blue), that is, cyan are displayed will be described.
[0046]
In the case of displaying cyan from the white display state as shown in FIG. 4A, the voltage application device 13 sets the black particles 24 and the white particles 26 in the section 36B (first adjacent section) adjacent to each other. As shown in FIG. 4B, the display-side electrode 18 is subjected to a first cycle of multiple cycles so that an alternating electric field for moving to 36G (second adjacent section) is formed between the substrates of the section 36B. A voltage 40 is applied, and a second alternating voltage 42 having the same frequency as the first alternating voltage and a phase difference of 180 ° is applied to the back side electrode 22B. At the same time, the first alternating voltage 40 is applied to the back-side electrodes 22G and 22R.
[0047]
As a result, a multi-cycle alternating voltage for moving particles in the direction parallel to the substrate surface is applied between the display side electrode 18 and the back side electrode 22B, and the display side electrode 18 and the back side electrodes 22G, 22R. And the same potential. Therefore, the black particles 24 and the white particles 26 in the section 36B move to the adjacent sections 36G, and the black particles 24 and the white particles 26 in the sections 36G and 36R do not move and remain in the sections.
[0048]
Next, as shown in FIG. 4C, a first alternating voltage 40 is applied to the display-side electrode 18 and a second alternating voltage 42 is applied to the back-side electrodes 22B and 22G. At the same time, the first alternating voltage 40 is applied to the back side electrode 22R.
[0049]
As a result, a multi-cycle alternating voltage for moving particles in the direction parallel to the substrate surface is applied between the display-side electrode 18 and the back-side electrodes 22G and 22B, and the display-side electrode 18 and the back-side electrode 22R. And the same potential. Therefore, the black particles 24 and the white particles 26 in the section 36G move to the adjacent sections 36R, and the black particles 24 and the white particles 26 in the section 36R do not move and remain in the sections. Thereby, the colored portions 22G and 22B are exposed, and cyan can be visually recognized from the display substrate 14 side. In addition, since an alternating voltage for moving the particles in the direction parallel to the substrate surface is applied between the display side electrode 18 and the back side electrode 22B, the black particles 24 and the white particles 26 in the section 36G are It moves only to the section 36R where no electric field is generated, and does not move into the section 36B.
[0050]
In this way, when displaying the colors of the adjacent colored portions 22B and 22G, the voltage for moving the particles in parallel is simultaneously applied to the sections 36B and 36G, and the particles in the sections 36B and 36G are simultaneously moved into the section 36R. Instead, the particle group in the section 36B is once moved to the section 36G, and then the particle group in the section 36G is moved to the section 36R. That is, a voltage for moving the particles in the parallel direction is applied stepwise to the adjacent compartments so that the particles move stepwise to the adjacent compartments. Thereby, even when displaying the color by the several coloring part of an adjacent division, it can suppress that display speed becomes slow.
[0051]
In the present embodiment, the case where the colored portions 22R and the colored portions 22B are not adjacent to each other is described. However, as shown in FIG. 5, the colored portions 22R, 22G, and 22B are adjacent to each other. It may be. In this case, for example, the back-side electrodes 20R, 20G, and 20B are isolated electrodes having substantially the same shape as the colored portions 22R, 22G, and 22B, and the display-side electrode 18 is a solid electrode to form a so-called active matrix structure. For example, when displaying the color by the coloring portions 22R and 22B, the voltage application device 13 applies the first alternating voltage 40 to the display side electrode 18 and the second alternating voltage 42 to the back side electrodes 22R and 22B. While applying, the 1st alternating voltage 40 is applied to the back side electrode 22G. As a result, the black particles 24 and the white particles 26 in the section 36R and the section 36B move into the section 36G in which no electric field is formed, the colored portions 22R and 22B are exposed, and R and B are viewed from the display substrate side. be able to.
[0052]
In this way, the moving distance of the particle group can be shortened by arranging each colored portion so that the plurality of colored portions are adjacent to each other, that is, so that there is no non-adjacent colored portion. Therefore, even when displaying colors by the plurality of colored portions on the back substrate side, it is possible to suppress a decrease in display speed.
[0053]
In the present embodiment, the case where black and white particles are used has been described. However, the present invention is not limited to this, and particles of other colors may be used. In addition, the color of the colored portion is not limited to three colors of red, green, and blue, but may be other colors as long as the color is different from the color of the particles, and may be one color, two colors, or four or more colors.
[0054]
【The invention's effect】
According to the present invention, there is an effect that it is possible to suppress a decrease in display speed when displaying a colored portion on the back substrate side.
[Brief description of the drawings]
FIG. 1A is a plan view of a coloring portion, and FIG. 1B is a schematic configuration diagram of an image display device.
FIG. 2 is a cross-sectional view of an image display medium.
3A is a plan view of a display substrate, and FIG. 3B is a plan view of a back substrate.
4A is a cross-sectional view of an image display medium before voltage application, FIG. 4B is a cross-sectional view of the image display medium after voltage application, and FIG. 4C is a cross-sectional view of the image display medium after voltage application. .
FIG. 5 is a plan view showing an arrangement of coloring portions.
6A is a cross-sectional view of an image display medium before voltage application, and FIG. 6B is a cross-sectional view of the image display medium after voltage application.
7A is a cross-sectional view of an image display medium before voltage application, and FIG. 7B is a cross-sectional view of the image display medium after voltage application.
[Explanation of symbols]
10 Image display device
12 Image display media
13 Voltage application device
14 Display board
16 Back substrate
18 Display side electrode
20R, 20G, 20B Back side electrode
22R, 22G, 22B Colored part
24 black particles
26 White particles
28 Gap member
30 cells
32, 34 wiring
36B, 36G, 36B sections
40, 42 alternating voltage

Claims (3)

A display substrate having at least translucency, a back substrate provided with at least three or more kinds of colored portions including a non-adjacent colored portion facing the display substrate, and a space between the display substrate and the back substrate The substrate is movably sealed between the substrates by an electric field formed by a voltage applied to the substrate, and includes at least one kind of charged particle group different from the color of the back substrate, and the plurality of colored portions. An image display medium comprising: a gap member that partitions the space into a plurality of cells ;
When displaying the color by the colored portion of a plurality of adjacent adjacent sections among the plurality of sections divided into a plurality of sections corresponding to the colored section in the cell, charging of the first adjacent section among the plurality of adjacent sections An alternating electric field for moving the particle group in a direction parallel to the plane including the display substrate is formed between the substrates in the first adjacent section to move the charged particle group to the second adjacent section, and Voltage applying means for forming an alternating electric field for moving the charged particle groups of two adjacent sections in the parallel direction between the first adjacent section and the substrate of the second adjacent section;
An image display device comprising: A display substrate having at least translucency, the display and the substrate and a counter, so that the colored portion of each Rutotomoni comprising at least three or more number multiple colored portion colors are adjacent to each other and the coloring of all the other types of color And a back substrate disposed in the substrate, and an electric field formed by a voltage applied between the display substrate and the back substrate, and is movably enclosed between the substrates, and is different from the color of the back substrate An image display medium comprising at least one type of charged particle group;
When displaying the color by the colored part of a plurality of adjacent adjacent sections among the plurality of sections divided between the substrates corresponding to the colored section, the charged particles in the plurality of adjacent sections are displayed on the display substrate. A voltage applying means for forming an alternating electric field for moving in a direction parallel to a plane including the substrate between the plurality of adjacent sections;
An image display device comprising: When the voltage application unit moves the charged particle group in a direction orthogonal to the parallel direction, a DC electric field or an alternating electric field having a first predetermined number of cycles is provided between the substrates at positions where the charged particle group is to be moved. When the voltage for forming the voltage is applied and the charged particle group is moved in the parallel direction, the second number larger than the first predetermined number of cycles is provided between the substrates at positions where the charged particle group is to be moved. The image display device according to claim 1, wherein a voltage for forming an alternating electric field having a predetermined number of cycles is applied.

Images