CN100510924C - Information display panel - Google Patents

Abstract

In a first aspect of the invention, an information display panel, in which at least one group of display media having optical reflectance and charge characteristics, formed by at least one group of particles, are scaled in a cell (corresponding to one display unit) formed by partition walls between two substrates, at least one substrate being transparent, and, in which the display media, to which an electrostatic field is applied, are made to move so as to display information such as an image, includes (1) a color filter formed by arranging filters having a predetermined numbers of colors on a transparent substrate at a display side so as to perform a color display, and a black layer arranged between the partition walls and the transparent substrate. (2) transparent color filters having three primary colors respectively arranged to one cell, and a colorless transparent clear portion arranged to the respective transparent color filters, and (3) transparent color filters having three primary colors respectively arranged to three pixels formed by dividing respective display units by means of partition walls, and a colorless transparent clear portion arranged to the respective transparent color filters.

Description

Information display panel

Technical field

The present invention relates to a kind of information display panel, it is at least one side is the cell that is formed by the next door (corresponding to 1 display unit) between transparent two substrates, the display medium more than at least a kind that inclosure is made of the particle more than at least a kind with optical reflectivity and charging property, by display medium being applied electric field display medium is moved, thus information such as display image.

In addition, the present invention relates to a kind of information display panel, it is at least one side is the cell that is formed by the next door (corresponding to 1 display unit) between transparent two substrates, the display medium more than at least a kind that inclosure is made of the particle more than at least a kind with optical reflectivity and charging property, by display medium being applied electric field display medium is moved, thus information such as color display image.

Background technology

Traditionally, instead the information display device of liquid crystal indicator (LCD) has proposed to adopt electrophoresis mode, electricity to cause the information display device of technology such as colored display mode, thermic mode, double-colored particle rotation mode.

These prior aries are compared with LCD, can obtain little with approaching big field angle, the power consumption of common printed thing, as to have memory function etc. advantage owing to have, therefore can consider can be used as follow-on cheap information display device, can expect to apply it to portable terminal device with aspects such as information demonstration, Electronic Paper.Particularly the electrophoresis mode that proposes is recently expected that very this electrophoresis mode is behind the dispersion liquid microencapsulation that will be made of discrete particles and solution it to be configured between the opposing substrates.

Yet, in the electrophoresis mode, because particle swimming in liquid, thereby the slack-off problem of response speed that exists the viscous resistance by liquid to cause.In addition, because the particle dispersion that makes high specific gravity such as titanium dioxide is in low-gravity solution, thereby the easy sedimentation that becomes, be difficult to keep the stability of disperse state, have the problem of the repetition stability that shortage information shows.In addition,, make cell size reach the level of microcapsules, also just make above-mentioned shortcoming be difficult to show from the teeth outwards, but still do not solve the problem of any essence even carried out microencapsulation.

On the other hand, with respect to the electrophoresis mode of utilizing the behavior in the solution, recently the scheme that also begins to have proposed to pack into conductive particle and charge transport layer and do not use solution on the part of substrate (for example, with reference to State of Zhao come, other 3 people, " new い ト Na-デ イ ス プ レ イ デ バ イ ス (I) ", on July 21st, 1999, Japan's iconology meeting annual conference (the 83rd) " Japan Hardcopy ' 99 " collection of thesis, p.249-252).Yet, because because of charge transport layer being set and charge generating layers makes structure complicated, and be difficult in conductive particle iunjected charge consistently, thereby the problem of deficient in stability when also having update displayed information.

As a method that is used to solve above-mentioned variety of issue, known have a kind of information display panel, it is between at least one side is transparent two substrates, after enclosing display medium, perhaps form the cell of isolating mutually by the next door, after in cell, enclosing display medium, display medium is applied electric field and display medium is moved, thus information such as display image.

In above-mentioned existing information display panel, show in order to carry out colour, can consider: for example use the filtrator of the display medium of white and black and arrangement specified color number and the color filter that constitutes.The color filter 51 that the filtrator of for example normally used redness (R), green (G), blue (B) constitutes, the example of one as shown in figure 19 constitutes 1 display unit 52 by red filtrator 51R, green filters 51G, blue filter 51B like that.And,, between each filtrator, be formed with the black matrix 53 of black in order to obtain the contrast of good Show Color.Therefore, in the existing color filter 51 of above-mentioned formation, need between each filtrator, form the operation of black matrix 53, exist manufacturing process to become complicated, and the problem that uprises of cost.

In addition, other existing examples as the information display panel of information such as color display image, a kind of information display panel (for example with reference to international open WO2004/008239 pamphlet) is arranged, it as shown in figure 20, in the transparency carrier 103 of the demonstration side of the transparent color filters 102R that disposes trichromatic color respectively, 102G, 102B and the gas space in the cell 105 between the substrate 104, enclose display medium (particle swarm or powder fluid) 101W, the 101B of white black dichromatism, display medium is moved, thus information such as color display image.

The information display panel of above-mentioned existing example, using under white particle and the situation of black particle as display medium, by transparent color filters 102R, 102G, the reflected light that reflected light that 102B produces white particle or black particle produce carries out colour and synthesizes, utilizing the reflected light that gets therefrom to carry out colour shows, thereby configuration information display panel, owing between the top in the next door 106 that forms 1 pixel and substrate 103, be provided with chromatograph 107, and between next door 108 that forms each cell 105 and substrate 103, also be provided with nonferrous layer 107, thereby can improve black concentration, but existence is by the problem of the show state deepening of the panel display surface that absorption caused of transparent color filters.

Summary of the invention

The purpose of first invention of the present invention is to address the above problem a little, and a kind of information display panel is provided, even it is using color filter to carry out also can simplifying manufacturing process, and reducing cost under the colored situation about showing.

In addition, the purpose of second invention of the present invention and the 3rd invention is to address the above problem a little, and a kind of information display panel is provided, and it can improve the brightness of the show state of panel display surface.

The information display panel of first invention of the present invention, it is at least one side is the cell that is formed by the next door (corresponding to 1 display unit) between transparent two substrates, the display medium more than at least a kind that inclosure is made of the particle more than at least a kind with optical reflectivity and charging property, by display medium being applied electric field display medium is moved, thereby information such as display image, it is characterized in that, on the transparency carrier that shows side, the color filter that the filtrator of arrangement specified color number is set and constitutes carries out colour and shows, and the layer of black is set between the transparency carrier of next door and demonstration side.

In addition, the preferred embodiments as of the present invention first information display panel of inventing has: color filter is arranged trichromatic filtrator and is constituted, and constitutes 1 display unit by 1 group of trichromatic filtrator; Color filter is arranged trichromatic filtrator and is constituted, and constitutes 1 display unit by 1 group of trichromatic filtrator and transparent filtrator; As trichromatic filtrator, use the filtrator of red (R), green (G), blue (B); As trichromatic filtrator, use the filtrator of cyan (C), magenta (M), yellow (Y); The display medium more than at least a kind with optical reflectivity and charging property that the particle by more than at least a kind in the inclosure cell constitutes is two kinds of display mediums of white display medium and black display medium.

According to first invention of the present invention, the filtrator of arranging the specified color number is set and the color filter that constitutes on the transparency carrier that shows side, carrying out colour shows, and, between the transparency carrier of next door and demonstration side the layer of black is set, show thereby can carry out colour, and, when carrying out the colour demonstration, can visually arrive the layer of the black of each pixel of encirclement, can access and the same effect of existing black matrix.The layer of this black can form by lamination when forming the next door, can simplify manufacturing process, and reduce cost.

In addition, the information display panel of second invention of the present invention, it is at least one side is the cell that is formed by the next door (corresponding to 1 display unit) between transparent two substrates, the display medium more than at least a kind that inclosure is made of the particle more than at least a kind with optical reflectivity and charging property, by display medium being applied electric field display medium is moved, thereby information such as color display image, it is characterized in that, in a cell, dispose the transparent color filters of trichromatic color respectively, and water white unimpeded portion is set in each transparent color filters.

In addition, the information display panel of the 3rd invention of the present invention, it is at least one side is the cell that is formed by the next door (corresponding to 1 display unit) between transparent two substrates, the display medium more than at least a kind that inclosure is made of the particle more than at least a kind with optical reflectivity and charging property, by display medium being applied electric field display medium is moved, thereby information such as color display image, it is characterized in that, further separate each display unit and constitute 3 pixels with the next door, the transparent color filters of trichromatic color is configured to 3 pixels respectively, and water white unimpeded portion is set in each transparent color filters.

In addition, the preferred embodiments as second invention of the present invention and the 3rd information display panel of inventing has: unimpeded portion is made of in hole, slit, leap straight line, linear fringe, the curve striped any; The width of unimpeded portion is 0.1%～200% of the mean grain size of the particle that constitutes display medium; With respect to the total area S of viewing area, the summation Sk of the area of unimpeded portion is 0.01＜Sk/S＜0.8.

According to second invention of the present invention and the 3rd invention, dispose the transparent color filters of trichromatic color at the cell of each display unit, and, in each transparent color filters water white unimpeded portion is set, thereby can accesses the information display panel of the brightness of the show state that can improve the panel display surface.

Description of drawings

The (a) and (b) of Fig. 1 are respectively the figure of an example of expression information display panel of the present invention.

The (a) and (b) of Fig. 2 are respectively the figure of another example of expression information display panel of the present invention.

The (a) and (b) of Fig. 3 are respectively the figure of the another example of expression information display panel of the present invention.

The (a) and (b) of Fig. 4 are respectively the figure of the another example of expression information display panel of the present invention.

The (a) and (b) of Fig. 5 are respectively the figure of the another example of expression information display panel of the present invention.

The (a) and (b) of Fig. 6 are respectively the figure of the another example of expression information display panel of the present invention.

Fig. 7 it (a)～(d) is respectively the figure of the another example of expression information display panel of the present invention.

Fig. 8 is the figure of the another example of expression information display panel of the present invention.

Fig. 9 is the figure of the another example of expression information display panel of the present invention.

The (a) and (b) of Figure 10 are respectively the figure that represents an example of of the present invention first information display panel of inventing.

Figure 11 is the figure that represents another example of the of the present invention first employed color filter of inventing of information display panel.

Figure 12 is the figure that represents the another example of the of the present invention first employed color filter of inventing of information display panel.

Figure 13 it (a)～(c) is respectively the color filter in the information display panel of first invention of the present invention and the figure of the relation of electrode.

Figure 14 is the figure of an example that is used to illustrate the information display panel of the 3rd invention of the present invention.

Figure 15 is the figure of another example that is used to illustrate the information display panel of the 3rd invention of the present invention.

Figure 16 is the figure of another example that is used to illustrate the information display panel of second invention of the present invention.

Figure 17 it (a)～(i) is respectively the figure of an example of unimpeded portion that is used for illustrating the color filter of second invention of the present invention and the 3rd information display panel of inventing.

Figure 18 is the figure of an example of the shape in the next door of expression in the information display panel of the present invention.

Figure 19 is the figure that is used to illustrate an example of the employed color filter of existing information display panel.

Figure 20 is the figure that is used to illustrate an example of existing information display panel.

Embodiment

At first, the basic structure to information display panel of the present invention describes.In information display panel, apply electric field to being sealing into two display mediums between the opposing substrates as object of the present invention.Along the direction of an electric field that is applied, charged display medium is subjected to the attraction of electric field force, Coulomb force etc., and display medium moves according to the variation of direction of an electric field, thereby the information of realization image etc. shows.Therefore, information display panel must be designed to that display medium moves equably, and stability can keep the repetition update displayed time or the stability when display message shown continuously.At this, be applied to the power on the particle that constitutes display medium, except the power that attracts each other that produces by the Coulomb force between the particle, also have the image force, intermolecular force, liquid bridge power, gravity of itself and electrode or substrate etc.

Based on (a) and (b)～Fig. 9 of Fig. 1, the basic comprising of information display panel of the present invention is described.

At Fig. 1 it (a), (b) in the example shown in, in each cell that forms by next door 4, will be by the optical reflectivity that particle more than at least a kind constitutes the display medium at least 2 kind or more 3 different (shown here is the white display medium 3W that is made of the particle swarm that shows with white particle 3Wa and the black display medium 3B that is made of with the particle swarm of black particle 3Ba demonstration) corresponding to by between electrode 5 (discrete electrodes) that is arranged at substrate 1 and the electrode 6 (discrete electrodes) that is arranged at substrate 2, applying the electric field that voltage produces, with substrate 1 with charged characteristic, 2 vertically move.So, shown in Fig. 1 it (a), make the visible white display medium 3W of observer and carry out white and show, perhaps shown in Fig. 1 it (b), make observer's visible black color display medium 3B and carry out black display.In addition, in the (a) and (b) of Fig. 1, omitted the next door that is positioned at the front side.Electrode can be arranged on the substrate outside, also can be arranged to imbed substrate inside.Being provided with under the situation of color filter, is example as described below: the part that 3 cells shown in the figure and each color filter of RGB or each color filter combination of CMY are constituted by each corresponding color filter, forms a cell as 1 display unit.

Example shown in the (a) and (b) of Fig. 2 is the example by the next door of the inboard of removing 1 display unit in the example shown in the (a) and (b) of Fig. 1.Being provided with under the situation of color filter, is following example: by per 1 display unit that constitutes with color filter, form a cell by next door 4.

At Fig. 3 it (a), (b) in the example shown in, in each cell that forms by next door 4, will be by the optical reflectivity that particle more than at least a kind constitutes the display medium at least 2 kind or more 3 different (shown here is the white display medium 3W that is made of the particle swarm that shows with white particle 3Wa and the black display medium 3B that is made of with the particle swarm of black particle 3Ba demonstration) corresponding to by between electrode 5 (line electrode) that is arranged at substrate 1 and the electrode 6 (line electrode) that is arranged at substrate 2, applying the electric field that voltage produces, with substrate 1 with charged characteristic, 2 vertically move.So, shown in Fig. 3 it (a), make the visible white display medium 3W of observer and carry out white and show, perhaps shown in Fig. 3 it (b), make observer's visible black color display medium 3B and carry out black display.In addition, in the (a) and (b) of Fig. 3, omitted the next door that is positioned at the front side.Electrode can be arranged on the substrate outside, also can be arranged to imbed substrate inside.Being provided with under the situation of color filter, is example as described below: the part that 3 cells shown in the figure and each color filter of RGB or each color filter combination of CMY are constituted by each corresponding color filter, forms a cell as 1 display unit.

Example shown in the (a) and (b) of Fig. 4 is the example by the next door of the inboard of removing 1 display unit in the example shown in the (a) and (b) of Fig. 3.Being provided with under the situation of color filter, is following example: by per 1 display unit that constitutes with color filter, form a cell by next door 4.

In the example shown in the (a) and (b) of Fig. 5, in each cell that forms by next door 4, at least the display medium that has optical reflectivity and charging property 3 that will be made of particle more than at least a kind (shown here is the white display medium 3W that is made of the particle swarm that shows with white particle 3Wa) is corresponding to by applying the electric field that voltage produces between electrode 5 that is arranged at substrate 1 and electrode 6, mobile on the direction parallel with substrate 1,2.So, shown in Fig. 5 it (a), make the visible white display medium 3W of observer and carry out white and show, perhaps shown in Fig. 5 it (b), make the color of observer's visible black color plate 7B and carry out black display.In addition, in the example shown in the (a) and (b) of Fig. 5, omitted the next door that is positioned at the front side.Electrode can be arranged on the substrate outside, also can be arranged to imbed substrate inside.Being provided with under the situation of color filter, is example as described below: the part that 3 cells shown in the figure and each color filter of RGB or each color filter combination of CMY are constituted by each corresponding color filter, forms a cell as 1 display unit.

Example shown in the (a) and (b) of Fig. 6 replaces with black display medium 3B with the white display medium 3W of the example shown in the (a) and (b) of Fig. 5, and black plate 7B is replaced with white plate 7W, carries out same demonstration.

In the example shown in Fig. 7 it (a)～(d), at first, as Fig. 7 it (a), (c) shown in, in each cell that forms by next door 4, the optical reflectivity that is made of particle more than at least a kind the display medium at least 2 kind or more 3 different with charged characteristic (shown here is the white display medium 3W that is made of the particle swarm that shows with white particle 3Wa and the black display medium 3B that is made of with the particle swarm of black particle 3Ba demonstration) forms corresponding to the external electrical field that forms member 11 by the external electrical field in the outside of being located at substrate 1 and be located at the outside of substrate 2 and applies the electric field that voltage produces between the member 12, with substrate 1,2 vertically move.So, shown in Fig. 7 it (b), make the visible white display medium 3W of observer and carry out white and show, perhaps shown in Fig. 7 it (d), make observer's visible black color display medium 3B and carry out black display.In addition, in Fig. 7 it (a)～(d), omitted the next door that is positioned at the front side.In addition, be provided with conductive component 13, and be provided with conductive component 14 in the inboard of substrate 2 in the inboard of substrate 1.This conductive component can not be provided with yet.Being provided with under the situation of color filter, is example as described below: the part that 3 cells shown in the figure and each color filter of RGB or each color filter combination of CMY are constituted by each corresponding color filter, forms a cell as 1 display unit.

Above-mentioned explanation goes for will being replaced with by the white display medium 3W that particle swarm constitutes respectively the white display medium that is made of powder fluid equally, will be replaced with the situation of the black display medium that is made of powder fluid by the black display medium 3B that particle swarm constitutes.Describe in the back for powder fluid.

In Fig. 8 and example shown in Figure 9, illustrated with example shown in Figure 4 and similarly used line electrode 5,6 to carry out another example of white black demonstration.In example shown in Figure 8, use is filled into the inner microcapsules 9 that form with white display medium 3W and black display medium 3B with iknsulating liquid 8, the cell that is formed by next door 4 of replaced the filling shown in Fig. 4 white display medium 3W and black display medium 3B.In addition, in example shown in Figure 9, use screw 10 that half polarity of whitewashing half blacking is also opposite mutually is filled into the inner microcapsules 9 that form as display medium with iknsulating liquid 8, the cell that is formed by next door 4 of replaced the filling shown in Fig. 4 white display medium 3W and black display medium 3B.Fig. 8 and arbitrary example shown in Figure 9 can similarly carry out white black demonstration with example shown in Figure 4, be provided with under the situation of color filter, be example as described below: by per 1 display unit, form a cell by next door 4, wherein said display unit is 3 microcapsules cells and color filter combination and constituting.In addition, the next door height that is provided with in 1 display unit can be shorter than substrate gap.

The explanation of＜the first invention 〉

First invention of the present invention is characterised in that, in the information display panel of above-mentioned formation, on the transparency carrier that shows side, the filtrator of arranging the specified color number is set and the color filter that constitutes, carry out colour and show, and the layer of black is set between the transparency carrier of next door and demonstration side.Below, describe for object lesson.

The (a) and (b) of Figure 10 are respectively the figure of formation of an example of the information display panel of expression first invention of the present invention, and it (b) of Figure 10 expression is along the cross section of the A-A line of Figure 10 it (a).In the example shown in the (a) and (b) of Figure 10, the parts identical with (a) and (b)～Fig. 9 of Fig. 1 have been added same symbol, omitted explanation it.In the example shown in the (a) and (b) of Figure 10, points different with the example of the (a) and (b) of Fig. 1～shown in Figure 9 on basic formation are, corresponding to red, green, blue, constitute the electrode 6 that shows side by electrode 6R, 6G, 6B, carry out the demonstration of 1 display unit with 1 cell.In addition, the width of color filter is preferred, and width than electrode is big at least, and the equitant width of adjacent color filter can be not bigger than the mean grain size of particle for display medium.If the width of color filter is littler than the width of electrode, then excitation reduces, if the overlapping width of color filter is bigger than the mean grain size of particle for display medium, then brightness reduces.

In the present example, except above formation, inboard at the substrate 2 of transparent demonstration side, setting is arranged red, green, blue filtrator 27R, 27G, 27B and the color filter 27 on the plane that constitutes across transparent layer, and next door 4 and show the layer 31 that black is set between the transparency carrier 2 of side.So, constitute 1 display unit by 1 group of redness, green, blue filtrator 27R, 27G, 27B.In addition, this 1 group of redness, green, blue filtrator 27R, 27G, 27B also can be made of 1 group of cyan, magenta, yellow filtrator.

Therefore, in the present example, make white display medium 3W move and show, thereby by color filter 27 visible colors of all kinds, the colour that can stipulate show to each transparency electrode 6R, 6G, the 6B that show side.In addition, as seen be arranged at the layer 31 of the black between next door 4 and the transparency carrier 2, thereby can around the cell that constitutes 1 display unit, see the frame of black, can obtain and the equal effect of existing black matrix by the transparent part of color filter 27.Its result can keep the contrast of Show Color well.

In addition, in above-mentioned example, be provided with color filter 27 in the inboard of substrate 2, but the present invention is not limited thereto.In addition, in above-mentioned example, electrode 5,6 is directly exposed, but also transparent protective seam can be set on the surface of color filter 27.In addition, in above-mentioned example, be provided with electrode 5,6, but also can color filter 27 be set, in this case, also transparent protective seam can be set on color filter 27 at penetralia at penetralia.In addition, in above-mentioned example, it is red, green, blue that the formation of the color of color filter 27 has adopted, perhaps cyan, magenta, yellow, but the present invention is not limited thereto.

Figure 11 and Figure 12 are respectively the figure of formation of another example that is used to illustrate the information display panel of first invention of the present invention.In Figure 11 and example shown in Figure 12, the parts identical with the (a) and (b) of Figure 10 are added same symbol, omit explanation to it.In Figure 11 and example shown in Figure 12, the points different with the example shown in the (a) and (b) of Figure 10 are: the formation of color filter 27 is provided with transparent filter 27T as the filtrator that constitutes 1 display unit.In addition, the configuration of red, green, blue filtrator 27R, 27G, 27B and transparent filter 27T is not limited to Figure 11 and example shown in Figure 12.

Promptly, in example shown in Figure 11, arrange red, green, blue filtrator 27R, 27G, 27B and 1 transparent filter 27T and constitute 1 color filter 27 across transparent layer, constitute 1 display unit by 1 group of redness, green, blue filtrator 27R, 27G, 27B and 1 transparent filter 27T.In addition, in example shown in Figure 12, arrange red, green, blue filtrator 27R, 27G, 27B and 3 transparent filter 27T and constitute color filter 27 across transparent layer, constitute 1 display unit by 1 group of redness, green, blue filtrator 27R, 27G, 27B and 3 transparent filter 27T.In addition, red, green, blue filtrator 27R, 27G, 27B also can constitute with cyan, magenta, yellow filtrator.

As Figure 11 and example shown in Figure 12, by transparent filter 27T being set, white display medium 3W is moved to this part show, thereby can make the colored color that shows become bright as the filtrator that constitutes 1 display unit.According to the number of transparent filter 27T, brightness uprises, and the example of Figure 11 and the example of Figure 12 are compared, and then the example of Figure 12 can carry out the demonstration brighter than the example of Figure 11.Particularly as the enclosing display medium and by display medium being applied electric field display medium is moved in the information display panel with information such as display images at least one side is the cell that is formed by the next door (corresponding to 1 display unit) between transparent two substrates of object of the present invention, this point is effective as a known solution that is difficult to improve the problem of brightness in the past.

Figure 13 it (a)～(c) is respectively the color filter of expression in the information display panel of the present invention and the figure of the relation of electrode.In the example shown in Figure 13 it (a), filtrator 27R, 27G, 27B corresponding to 1 group of redness, green, blueness are provided with the ITO electrode 6 of 3 upsides along longitudinal direction, and the ITO electrode 5 of 1 downside are set along transverse direction.In the example shown in Figure 13 it (b), be arranged in 4 filtrators of 2 * 2 corresponding to what 1 group of redness, green, blue filtrator 27R, 27G, 27B and 1 transparent filter 27T constituted, along longitudinal direction the ITO electrode 6 of 2 upsides is set, and the ITO electrode 5 of 2 downsides is set along transverse direction.In the example shown in Figure 13 it (c), be arranged in 6 filtrators of 2 * 3 corresponding to what 1 group of redness, green, blue filtrator 27R, 27G, 27B and 3 transparent filter 27T constituted, along longitudinal direction the ITO electrode 6 of 3 upsides is set, and the ITO electrode 5 of downside is set along transverse direction.

The explanation of＜the second invention and the 3rd invention 〉

Second invention of the present invention is characterised in that, in the information display panel of above-mentioned formation, disposes the transparent color filters of trichromatic color respectively in 1 cell, and water white unimpeded (clear portion) be set on each transparent color filters.In addition, the 3rd invention of the present invention is characterised in that, in the information display panel of above-mentioned formation, further separate each display unit and constitute 3 pixels by the next door, the transparent color filters of trichromatic color is configured to 3 pixels respectively, and water white unimpeded portion is set on each transparent color filters.Below, concrete example is described.

Figure 14 is the figure of an example that is used to illustrate the information display panel of the 3rd invention of the present invention.In example shown in Figure 14, expression is made of the example of 1 display unit 3 cells 41 that separated by next door 4 separately, it is following formation: transparent color filters 42R, 42G, 42B that trichromatic color is set respectively at 3 cells 41, on the transparency carrier 2 of display surface side, corresponding to transparency electrode 6, transparent color filters 42R, 42G, 42B are set respectively.In the present example, produce electric field, display medium 3W, 3B are moved, show thereby carry out colour corresponding to electric field by between electrode 5,6, applying voltage.In addition, the 44th, be arranged at the top in next door 4 and the nonferrous layer between the substrate 2.In addition, under the situation that colour shows, with 3 pixels that dispose the three primary colors color filter is that 1 group cell becomes display unit, and display medium moves independently in each pixel that constitutes this display unit, thereby the synthetic colour that is produced that can carry out three looks that obtain by color filter shows.

Figure 15 is the figure of another example that is used to illustrate the information display panel of the 3rd invention of the present invention.In example shown in Figure 15, represent to constitute the example of 1 display unit by 3 cells 41 that separated by next door 4 separately, it is following formation: transparent color filters 42R, 42G, 42B that trichromatic color is set respectively at 3 cells 41.In the present example,, display medium 3W, 3B are moved, show thereby carry out colour corresponding to electric field by applying electric field from the outside.In addition, the 44th, be arranged at the top in next door 4 and the nonferrous layer between the substrate 2.

Figure 16 is the figure of an example that is used to illustrate the information display panel of second invention of the present invention.In example shown in Figure 16, what represent is in formation shown in Figure 14, next door 4 (next door at two ends among Figure 14) former state that constitutes 1 display unit keeps, and removes next door and the next door between transparent color filters 42G and the 42B (2 next doors of the central part among Figure 14 except that the next door at two ends) between transparent color filters 42R and the 42G.Also can preferably implement the present invention in the present example.

In the example of Figure 14～shown in Figure 16, the present invention's second invention and the 3rd maximum of inventing are characterised in that, are provided with water white unimpeded 43 on each transparent color filters 42R, 42G, 42B.Like this, by on each transparent color filters 42R, 42G, 42B, being provided with water white unimpeded 43, in carry out the colored information display panel of the present invention that shows with reflected light, compare with whole existing example that constitutes by transparent color filter, can reduce the absorption of color filter, can make the show state of panel display surface keep excitation and increase brightness.In the color filter water white unimpeded 43 can be by following formation: after making color filter formation and water white unimpeded consistent breach, on whole of color filter water white protective seam is set and forms; Perhaps, only on damaged of color filter, directly be provided with water white unimpeded and constitute.In addition, the width of color filter is preferred, and width than show electrode is big at least, and the equitant width of adjacent color filter can be not bigger than the mean grain size of particle for display medium.If the width of color filter is littler than the width of show electrode, then excitation reduces, if the overlapping width of color filter is bigger than the mean grain size of particle for display medium, then brightness reduces.

Figure 17 it (a)～(i) is respectively the figure of an example of unimpeded portion that is used for illustrating the color filter of second invention of the present invention and the 3rd information display panel of inventing.In the example shown in Figure 17 it (a)～(i), express with respect to 1 group of transparent color filters 42R, 42G constituting 1 display unit, unimpeded 43 the formation of 42B.

In the example shown in Figure 17 it (a),, unimpeded 43 of shape of slit is set along the transverse direction among the figure on the top that strides across transparent color filters 42R, 42G, 42B.In the example shown in Figure 17 it (b), transparent color filters 42R, 42G, 42B separately between, unimpeded 43 of shape of slit is set along the longitudinal direction among the figure.In the example shown in Figure 17 it (c), transparent color filters 42R, 42G, 42B separately in be provided with same spaced a plurality of circles the hole was constituted unimpeded 43.In addition, can also further the shape in hole be made the circular port of minor diameter, the hole of perhaps making quadrilateral, triangle etc.In the example shown in Figure 17 it (d), transparent color filters 42R, 42G, 42B separately in be provided with same spaced a plurality of stars the hole was constituted unimpeded 43.

In the example shown in Figure 17 it (e),, unimpeded 43 of shape of slit is set along the transverse direction among the figure at the central portion that strides across transparent color filters 42R, 42G, 42B.In the example shown in Figure 17 it (f), be and same unimpeded 43 of Figure 17 it (b), promptly transparent color filters 42R, 42G, 42B separately between, unimpeded 43 of the shape of slit that is provided with along the longitudinal direction among the figure just is provided with than wideer unimpeded 43 of example width shown in Figure 17 it (b).In the example shown in Figure 17 it (g), stride across transparent color filters 42R, 42G, 42B, unimpeded 43 of a plurality of shape of slit is set along the transverse direction among the figure.In the example shown in Figure 17 it (h), to transparent color filters 42R, 42G, 42B be provided with from figure upper left side to bottom-right crossover track constituted unimpeded 43.In the example shown in Figure 17 it (i), to transparent color filters 42R, 42G, 42B be provided with from figure upper left side to bottom-right a plurality of crossover track constituted unimpeded 43.

In addition, in information display panel of the present invention, unimpeded 43 width be preferably the particle that constitutes display medium mean grain size 0.1%～200%.At this, if unimpeded 43 width can't expect then that less than 0.1% of the mean grain size of the particle that constitutes display medium brightness improves, if unimpeded 43 width surpass the particle that constitutes display medium mean grain size 200%, then excitation reduces.In addition, with respect to the total area S of viewing area, the summation Sk of the area of unimpeded portion is preferably 0.01＜Sk/S＜0.8.At this, if Sk/S is below 0.01, can't expect that then brightness improves, if Sk/S is more than 0.8, then excitation reduces.

In addition, in information display panel of the present invention, next door 4 can be to form the cell (being equivalent to 1 display unit) that surrounded by this next door fully or the continuous next door of pixel, also can be the discontinuous next door that forms not exclusively the cell 41 that is surrounded by this next door, keep the function in the gap between substrate and prevent that the function of display medium uneven distribution is just passable as long as have with the size of regulation.In addition, as Figure 16, the cell of 1 display unit of spaced apart formation also can be set and form 2 next doors of the inboard of 3 pixels.In addition, in the set next door, inside of the cell that constitutes 1 display unit, can make the short next door of aspect ratio substrate gap.

Below, describe for constituting as of the present invention first each parts of inventing the information display panel of～the three object of inventing.

About substrate, at least one substrate is the transparent substrate 2 that can observe the color of display medium 3 from the outside of information display panel, and its suitable material is the transmission of visible light height, and the good material of thermotolerance.Substrate 1 can be transparent also can be opaque.Baseplate material is carried out illustrative words, can list polymer sheets such as polyethylene terephthalate, Polyethylene Naphthalate, polyethersulfone, tygon, polycarbonate, polyimide, esters of acrylic acid or metal sheet such have a flexible material, and glass, quartz etc. do not have flexible inorganic sheet.The thickness of substrate is preferably 2～5000 μ m, further is suitably for 5～2000 μ m, if thin excessively, then is difficult to keep intensity, substrate distance homogeneity, if thicker than 5000 μ m, then is unsuitable for making the situation of slim information display panel.

As the electrode that is provided with corresponding to needs or the formation material of conductive component, can metal species such as aluminium, silver, nickel, copper, gold be arranged illustration, or conducting metal oxide class such as tin indium oxide (ITO), antimony tin (ATO), indium oxide, conductive tin oxide, electroconductive zinc oxide, electroconductive polymer classes such as polyaniline, polypyrrole, polythiophene can suitably be selected to use.Formation method as electrode, can adopt by sputtering method, vacuum vapour deposition, CVD (chemical vapor deposition) method, rubbing method etc. to make above-mentioned illustrative material form method of patterning, perhaps adopt by conductive agent being mixed into be coated with in solvent or the synthetic resin adhesive and form method of patterning with film like.The electrode that is provided with on visual side (display surface side) substrate must be transparent, but the electrode or the conductive component that are arranged on the rear side substrate need not to be transparent.No matter be which kind of situation, all be fit to the above-mentioned material that use can form pattern and have electric conductivity.In addition,, be suitably for 3～1000nm, be preferably 5～400nm as long as the thickness of electrode or conductive component can be guaranteed electric conductivity, not hinder transmitance.Material, thickness that is arranged on electrode on the rear side substrate or conductive component etc. can be same with above-mentioned electrode or the conductive component that is arranged on the display surface side group plate, but need not to be transparent.In addition, can superpose direct current or interchange of the external voltage input during this situation.

For the next door 4 that is arranged at substrate, its shape can be according to shape, the configuration of the electrode of the kind of the display medium that is used to show, configuration, suitably carrying out optimization sets, limited without exception, but the width in next door can be adjusted into 2～100 μ m, be preferably 3～50 μ m, and the height in next door can be adjusted into 10～100 μ m, be preferably 10～50 μ m.

In addition, when forming the next door, can consider the both sides of the chest method that behind each self-forming rib on relative two substrates 1,2, engages respectively, only on the substrate of a side, form single rib method of rib.In the present invention, arbitrary method all is fit to use.

By the cell that the next door that is made of these ribs forms, as shown in figure 18, observe from the base plan direction, can quadrilateral, triangle, wire, circle, hexagon be arranged illustration, as its configuration, can clathrate, cellular or mesh shape be arranged illustration.Reasonable is to dwindle as far as possible and divide suitable part (area of cell frame part) from the visual next door cross-section of display surface one side, can increase the sharpness of demonstration like this.

At this,, can enumerate mould transfer printing, silk screen print method, sand-blast, photoetching process, additive process if the formation method of counter septum is carried out example.Arbitrary method is all applicable in the information display panel of the present invention, but in these methods, photoetching process, the mould transfer printing of etchant resist used in suitable employing.

Then, in the information display panel of first invention of the present invention and second invention, for describing as the employed for example powder fluid of display medium.In addition, about the title of the powder fluid that uses in the information display panel of the present invention, the applicant obtains the right of " electronics powder fluid (registered trademark): number of registration 4636931 ".

" powder fluid " among the present invention is neither also self not demonstrate both material of intermediateness mobile, that have fluid and particle characteristics concurrently by the power of liquid by the power of gas.For example, liquid crystal be defined as liquid and solid in the middle of mutually, have as the mobile of fluid characteristics with as anisotropy (optical property) (the ordinary society: big encyclopaedia dictionary) of solid features.On the other hand, even the definition of particle is the object that negligible substantially size also has limited quality, (ball is kind: the physics dictionary) to be subjected to the influence of gravity.At this, also there is the special state that is called gas-solid fluidized bed body, liquid-solid liquid in the particle, if from base plate to particle jet-flow gas, then the speed corresponding to gas applies power upwards to particle, when this power and gravitational equilibrium, be in the particle of the state that as fluid, can flow easily, be referred to as gas-solid fluidized bed body, similarly will utilize fluid to make the state of its liquidation be called liquid-solid liquid (ordinary society: big encyclopaedia dictionary).Such gas-solid fluidized bed body or liquid-solid liquid are the states that utilizes gas stream or flow of liquid.In the present invention, the clear and definite material that also self does not demonstrate mobile state by the power of such gas by the power of liquid of can producing specifically neither is defined as powder fluid with it.

Promptly, powder fluid among the present invention is same with the definition of liquid crystal (centre of liquid and solid mutually), be the intermediateness that has particle and liquid two characteristics concurrently, demonstrate the utmost point feel bad aforementioned gravity as particle characteristic influence and have the material of the special state of high fluidity.Such material can obtain with aerosol state, promptly obtain as the dispersed system that dispersed substance stably swims in the gas with solid shape or liquid material, in information display panel of the present invention, with solid shape material as dispersed substance.

Information display panel of the present invention, between at least one side is transparent opposing substrates, for example enclose in gas as dispersed substance stably floating solid particle aerosol state and demonstrate the powder fluid of high fluidity, such powder fluid is rich mobile, even can not measure angle of repose as the index that shows powder fluidity, low electric field force is down just can be easily stably mobile under the effect of Coulomb force etc.

The for example powder fluid that uses as display medium among the present invention as mentioned above, is neither also self just not demonstrate both material of intermediateness mobile, that have fluid and particle characteristics concurrently by the power of liquid by the power of gas.This powder fluid especially can be taked aerosol state, and in information display panel of the present invention, float as dispersed substance in gas has under the state of solid shape material more stablely, is used as display medium.

Below, describe for the particle for display medium that in information display panel of the present invention, constitutes display medium (below be also referred to as particle).Particle for display medium can be only directly be made of to constitute with as display medium or be modulated into powder fluid with as display medium as display medium or with other particle this particle for display medium.

In particle, in resin, can comprise charge control agent, colorant, inorganic additive etc. as required as its principal ingredient samely.Below, example illustrates resin, charge control agent, colorant, other adjuvant.

Example as resin, can list urethane resin, urea resin, acrylic resin, vibrin, acrylated polyurethane resin, acroleic acid polyurethane silicone resin, acroleic acid polyurethane fluororesin, acrylic acid fluororesin, silicone resin, silicon Acrylote ketone resin, epoxy resin, polystyrene resin, styrene acrylic resin, polyolefin resin, butyral resin, permalon, melmac, phenolics, fluororesin, polycarbonate resin, polysulfone resin, polyether resin, polyamide etc., also can mix more than 2 kinds.Particularly from the viewpoint of control with the bounding force of substrate, what be fit to is acrylated polyurethane resin, silicon Acrylote ketone resin, acrylic acid fluororesin, acroleic acid polyurethane silicone resin, acroleic acid polyurethane fluororesin, fluororesin, silicone resin.

For charge control agent, be not particularly limited, as negative charge controlling agent, can list oil-soluble dyes, quaternary ammonium compound, calixarene compound, boron-containing compound (benzoic acid boron complex), nitro imidazole derivatives of for example salicylic acid metal complex, containing metal azo dyes, containing metal (containing metallic ion or metallic atom) etc.As positive charge control agent, can list for example aniline black byestuffs, triphenyl methane compounds, quaternary ammonium compound, polyamino resin, imdazole derivatives etc.In addition, can also be with the resin of nitrogenous ring compound such as metal oxide, pyridine such as ultra micron silicon dioxide, ultra micron titanium dioxide, ultra micron aluminium oxide and derivant thereof or salt, various organic pigment, fluorine-containing, chlorine, nitrogen etc. etc. as charge control agent.

As colorant, can use pigment, dyestuff various of all kinds as following illustrative organic or inorganic.

As black colorant, can use carbon black, cupric oxide, manganese dioxide, nigrosine, activated charcoal etc.

As blue colorant, the C.I. pigment blue 15 is arranged: 3, the part chloride of C.I. pigment blue 15, dark purple, cobalt blue, alkali blue lake, Victoria blue color lake, phthalocyanine blue, metal-free phthalocyanine blue, phthalocyanine blue, fast sky blue, indanthrene blue BC etc.

As red stain, have that colcother, cadmium red, red lead, mercuric sulphide, cadmium, permanent red 4R, lithol red, pyrazolone red, Wo Qiuge are red, calcium salt, C lake red CAN'T D, brilliant carmine 6B, eosine lake, rhodamine color lake B, alizarine lake, bright carmine 3B, C.I. paratonere 2 etc.

As yellow colorants, chrome yellow, zinc yellow, cadmium yellow, yellow iron oxide, inorganic permanent yellow, nickel titanium yellow, navel orange Huang, naphthol yellow S, hansa yellow G, hansa yellow 10G, benzidine yellow G, benzidine yellow G R, quinoline yellow lake, permanent yellow NCG, tartrazine lake, C.I. pigment Yellow 12 etc. are arranged.

As green colourant, chrome green, chromium oxide, pigment green B, C.I. pigment Green 7, peacock green color lake, final yellowish green G (final yellow green G) etc. are arranged.

As orange colorant, red chrome yellow, molybdate orange, permanent orange GTR, pyrazolone orange, fast orange (vulcan orange), indanthrene brilliant orange RK, Benzidine orange G, indanthrene brilliant orange GK, C.I. pigment orange 31 etc. are arranged.

As violet colorant, manganese violet, Fast violet B, methyl violet color lake etc. are arranged.

As white color agents, zinc paste, titanium dioxide, stibium trioxide, zinc sulphide etc. are arranged.

As extender pigment, there are ground barium sulfate, barium carbonate, clay, silicon dioxide, white carbon, talcum, aluminium oxide white etc.In addition, as various dyestuffs such as alkalescence, acidity, dispersion, direct dyess, nigrosine, methylene blue, rose-red, quinoline yellow, ultramarine blue etc. are arranged.

As the example of mineral-type adjuvant, can list that titanium dioxide, zinc paste, zinc sulphide, antimony oxide, lime carbonate, white lead, talcum, silicon dioxide, calcium silicate, aluminium oxide are white, cadmium yellow, cadmium red, cadmium orange, titan yellow, dark purple, ultramarine, cobalt blue, cobalt green, cobalt violet, iron oxide, carbon black, the manganese ferrite is black, the cobalt ferrite is black, copper powder, aluminium powder etc.

These pigment and mineral-type adjuvant can use separately or multiple being used in combination.Wherein, especially as the preferred carbon black of black pigment, as the preferred titanium dioxide of Chinese white.

Mix above-mentioned colorant, can make the particle for display medium of desired color.

In addition, particle for display medium of the present invention (below, be also referred to as particle), its mean grain size d (0.5) are preferably in the scope of 1～20 μ m and be evenly distributed.If mean grain size d (0.5) greater than this scope, then lacks the sharpness on showing, if less than this scope, then the aggregation force between the particle becomes excessive, therefore can be to the mobile obstruction of bringing of display medium.

In addition, in the present invention, about each particle grain size distribution, the span of the size distribution shown in the following formula (Span) less than 5, preferred less than 3.

Span＝(d(0.9)-d(0.1))/d(0.5)

(wherein, d (0.5) is the grain diameter value of representing with μ m, 50% bigger in the particle than it, and 50% is littler than it; D (0.1) is the grain diameter value of representing with μ m, and particle diameter is 10% at the ratio of this particle below numerical value; D (0.9) is the grain diameter value of representing with μ m, and particle diameter is 90% at the ratio of this particle below numerical value.)

By span is in the scope below 5, the size of each particle is even, can realize moving uniformly of display medium.

In addition, for the relation of each particle, the d (0.5) that importantly has the particle of minimum diameter in employed particle is below 50, is preferably below 10 with respect to the ratio of the d (0.5) of the particle with maximum gauge.Even if the size distribution span is little, also owing to be that the particle that charged characteristic differs from one another moves each other in the opposite direction, therefore what be fit to is that both sides' particle size is close, and both sides' particle can easily move according to equivalent round about, and this just requires above-mentioned scope.

In addition, above-mentioned size distribution and particle diameter can be tried to achieve by laser diffraction/scattering method etc.If to particle irradiating laser as determination object, then can produce the light intensity distributions pattern of the diffraction/scattered light in space, because there are corresponding relation in this light intensity pattern and particle diameter, therefore can measure particle diameter and size distribution.

At this, particle diameter among the present invention and size distribution are distributed by volume reference and obtain.Specifically, can use Mastersizer2000 (Malvern InstrumentsLtd.) mensuration machine, in stream of nitrogen gas, drop into particle, use subsidiary analysis software (being distributed as the software on basis with the volume reference that adopts the Mie theory), measure particle diameter and size distribution.

The carried charge of particle for display medium obviously depends on its condition determination, the carried charge of the particle for display medium in the Given information display panel depends on the initial strip electric weight substantially, with the contacting of next door, with the contacting of substrate, along with the saturation value of the charged behavior of charge decay, the especially particle for display medium in elapsed time is a determinative.

People of the present invention have carried out the result that studies intensively, discovery is measured the carried charge of the employed particle of display medium by use identical carrier granular in blowing out (blowoff) method, can estimate the scope of the suitable charged characteristic value of particle for display medium.

In addition, in the situation of the dry type information display panel that display medium is applied to drive in the gas space, it is important that the gas of the gap of the encirclement display medium between substrate is managed, and it helps to improve exhibit stabilization.Specifically, for the humidity of the gas of gap, the relative humidity under 25 ℃ is that 60% RH is following, to be preferably below 50% RH be important.

In (a) and (b)～Fig. 9 of Fig. 1, this gap is meant gas part hermetic unit, that so-called display medium contacted of occupying part, information display panel of occupying part, next door 4 that deducts electrode 5,6 (electrode being arranged under the situation of substrate inboard), display medium 3 from the part that is clipped in opposing substrates 1, substrate 2.

The gas of gap is so long as in above-mentioned humidity range, its kind just without limits, what be fit to is dry air, drying nitrogen, dry argon gas, dry helium gas, dry carbon dioxide, dry methane etc.This gas must be enclosed under the condition that keeps its humidity in the information display panel, for example under the humidity environment of regulation, carry out the filling of display medium, the assembling of information display panel etc., in addition, apply in order to prevent that encapsulant, encapsulating method that moisture is invaded from the outside from being important.

As substrate in the information display panel of object of the present invention and the interval between the substrate, as long as display medium can move, can to keep contrast just passable, be adjusted into 10～500 μ m usually, be preferably 10～200 μ m.

The volume occupation rate of display medium is preferably 5～70% in the gas space between the opposing substrates, and more preferably 5～60%.Under 70% the situation of surpassing, to the mobile generation obstacle of display medium, under the situation of less than 5%, it is unintelligible that contrast becomes easily.

Information display panel of the present invention, be applicable to notebook-PC, PDA, portable phone, the display part of removable machine such as portable terminal, e-book, electronic newspaper, electronic guide Electronic Paper such as (operational manuals), billboard, placard, notice boards such as blackboard, desk top computer, household appliances, the display part of Automobile Products etc., point card (point card), the card display part of IC-card etc., e-advertising, electronics POP (Pointof presence, Point of Purchase advertising), the electronics price tag, the electronics inventory tag, electronic music, the display part of RF-ID machine, in addition, also be applicable to by what external electrical field formed that member carries out that display medium drives and can write paper again.

In addition, for the type of drive of information display panel of the present invention, can use various types of type of drive as described below: panel from do not use the simple matrix type of drive or the static drive mode of on-off element on one's body and used with thin film transistor (TFT) (TFT) for the active matrix drive mode of the both-end sub-switch element of representative, used the external electrical field type of drive of external electrical field formation member etc.

Claims (3)

1. information display panel, it is at least one side is the cell that is formed by the next door between transparent two substrates, the display medium more than at least a kind that inclosure is made of the particle more than at least a kind with optical reflectivity and charging property, by display medium being applied electric field display medium is moved, thereby color display image information, wherein, described cell is corresponding to 1 display unit, it is characterized in that, in a cell, dispose the transparent color filters of trichromatic color respectively, and water white unimpeded portion is set in each transparent color filters, and this unimpeded portion is by the hole, slit, cross over straight line, linear fringe, any formation in the curve striped.

2. information display panel according to claim 1 is characterized in that, the width of unimpeded portion be constitute display medium particle mean grain size 0.1%～200%.

3. information display panel according to claim 1 and 2 is characterized in that, with respect to the total area S of viewing area, the summation Sk of the area of unimpeded portion is 0.01＜Sk/S＜0.8.

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