CN1940691A - Information display panel and method of manufacturing the same - Google Patents
Information display panel and method of manufacturing the same Download PDFInfo
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- CN1940691A CN1940691A CN 200610141046 CN200610141046A CN1940691A CN 1940691 A CN1940691 A CN 1940691A CN 200610141046 CN200610141046 CN 200610141046 CN 200610141046 A CN200610141046 A CN 200610141046A CN 1940691 A CN1940691 A CN 1940691A
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Abstract
In an information display panel, in which display media are sealed between opposed 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, a gap maintaining member formed by arranging plural patterns each having a small area between an information display region of the panel and a sealing agent forming portion arranged at a peripheral portion of the panel. The present invention provides an information display panel and a method of manufacturing the same, which can easily remove the display media remaining on the gap maintaining member, and, which can obtain a panel having an excellent parallelism by evenly pressing the substrates during the substrate stacking operation.
Description
Technical field
The present invention relates to a kind of information display panel and manufacture method thereof, this information display panel, between at least one side is transparent two substrates facing mutually, enclose display medium, display medium is moved by display medium being applied electric field, thus information such as display image.
Background technology
In the past, instead the information display device of liquid crystal indicator (LCD) had proposed to adopt electrophoresis mode, electricity to cause the information display device of technology such as colored display mode, hot 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 papers.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 dispersed particle and coloring solution this dispersion liquid to be arranged between the substrate of facing mutually.
Yet, in the electrophoresis mode, because particle swimming in liquid, thereby the slow such problem of response speed that exists the viscous resistance by liquid to cause.In addition, because the particle of high specific gravity such as titanium dioxide is dispersed 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, even microencapsulation makes 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.
On the other hand, for the electrophoresis mode of utilizing the behavior in solution, recently also begun to propose on the part of substrate, to pack into electroconductive particle and charge transport layer and do not used the scheme (for example, with reference to non-patent literature 1) of solvent.Yet, because because of charge transport layer being set and charge generating layers makes structure complicated, and be difficult in electroconductive particle iunjected charge consistently, thereby the problem of deficient in stability when also having update displayed.
As a method that is used to solve above-mentioned variety of issue, known have a kind of information display panel, it is to enclose the display medium more than at least a kind with optical reflectivity and charging property that is made of the particle more than at least a kind between transparent two substrates facing mutually at least one side, by display medium being applied electric field display medium is moved, thus display message.
Non-patent literature 1: State of Zhao comes, other 3 people, " new い ト Na one デ イ ス プ レ イ デ バ イ ス (I) ", and on July 21st, 1999, Japanese iconology can annual conference (the 83rd) " Japan Hardcopy ' 99 " collection of thesis, p.249-252
Summary of the invention
Invent problem to be solved
In the past, in the information display panel of said structure, the outer most edge portion between two substrates existed by the sealant formation portion of sealant with the space sealing between substrate.When pressurization engages their to two substrates, in the information display area territory, form the next door and make the substrate can be crooked, yet sealing agent formation portion sometimes substrate produce crooked and make the gap between substrate inhomogeneous.In order to address this problem, can consider that between information display area territory (next door formation portion) and sealant formation portion the gap being set guarantees to use parts.
On the other hand, in the information display panel of said structure, must carry out being formed at the operation of filling display medium in the cell between the next door on the substrate, at this moment, when the gap guarantees to be full pattern with parts, in the flank of its wide cut, same with the leading section in next door, the amount that is carried on the display medium on the rib increases, if the therefore condition of removing (number of times etc.) of not strict setting display medium then exists removing of display medium can produce residual problem.In addition, if carry out stacked to substrate under residual the state of display medium on guaranteeing with parts in the gap, then the gap between substrate can't be remained constantly, can produce the panel of the depth of parallelism difference of 2 mother substrates, its result exists can produce the problem that profile is bad, drive characteristic is bad.
The objective of the invention is to address the above problem a little, a kind of information display panel and manufacture method thereof are provided, this information display panel can be removed simply and remain in the gap and guarantee with the display medium on the parts, by even extruding substrate when the multilayer board, thereby can access the good panel of the depth of parallelism.
The method that is used to deal with problems
The information display panel of the 1st aspect of the present invention invention, it encloses display medium between at least one side is transparent two substrates facing mutually, by display medium being applied electric field display medium is moved, thereby information such as display image, it is characterized in that, in the information display area territory of panel and be arranged on to be formed with between the sealant formation portion of its outer edge and the gap that a plurality of small size patterns form is set guarantees to use parts.
The information display panel of the 2nd aspect of the present invention invention, it encloses display medium between at least one side is transparent two substrates facing mutually, by display medium being applied electric field display medium is moved, thereby information such as display image, it is characterized in that, in the information display area territory of panel and be arranged on and form the gap between the sealant formation portion of its outer edge and guarantee to use parts, guarantee with parts in described gap is to be made of the shape that whole patterns in many small size patterns or a part of pattern are connected.
In addition, the preferable example of the information display panel of inventing as the 1st aspect of the present invention invention and the 2nd aspect gappedly guarantees that pattern and the partition pattern in the information display area territory with parts are the shapes of one; The gap is guaranteed to be made as linear pattern with the small size pattern of parts, constitute the gap along equidirectional a plurality of linear pattern arranged side by side and guarantee to use parts; Interval width between the line of linear pattern is wideer than the particle diameter of the particle that constitutes display medium; The live width of linear pattern is 5～100 μ m; Interval between the adjacent line is identical with live width.
In addition, the manufacture method of information display panel of the present invention is to make the method for above-mentioned information display panel, it is characterized in that the material identical materials in the next door in the information display area territory of use and formation panel is also made the gap simultaneously by same operation and guaranteed to use parts.
The invention effect
Adopt the present invention, in the information display area territory of panel be arranged on and form the gap that pattern that a plurality of small sizes are set forms between the sealant formation portion of its outer edge and guarantee to use parts, therefore the gap between substrate can be maintained constant, on the other hand, residual display medium on can not guaranteeing with parts in the gap, by even extruding substrate when the multilayer board, can access the good panel of the depth of parallelism.
Description of drawings
Fig. 1 (a) and (b) are respectively the figure of an example of expression information display panel of the present invention.
Fig. 2 (a) and (b) are respectively the figure of another example of expression information display panel of the present invention.
Fig. 3 (a) and (b) are respectively the figure of the another example of expression information display panel of the present invention.
Fig. 4 (a)～(d) is respectively the figure of the another example of expression information display panel of the present invention.
Fig. 5 (a) and (b) are respectively the figure of the another example of expression information display panel of the present invention.
Fig. 6 is the figure of the another example of expression information display panel of the present invention.
Fig. 7 is the figure of the another example of expression information display panel of the present invention.
Fig. 8 is the figure of structure of an example of expression information display panel of the present invention.
Fig. 9 is the figure that is used to illustrate a preferable example of linear pattern shown in Figure 8.
Figure 10 (a)～(h) is respectively the figure of an example of the pattern of the small size that is used for illustrating that information display panel of the present invention adopts.
Figure 11 (a) and (b) are respectively the figure of another example of the pattern of the small size that is used for illustrating that information display panel of the present invention adopts.
Figure 12 is the figure of an example of the next door shape in the expression information display panel of the present invention.
Symbol description:
1,2: substrate
3: display medium (population, powder fluid)
3W: white display medium
3Wa: white display medium particle
3B: black display medium
3Ba: black display medium particle
4: the next door
5,6: electrode
7: the black plate
8: iknsulating liquid
9: microcapsules
10: screw
11,12: external electrical field forms member
13,14: conductive component
21-1: the 1st cell
21-2: the 2nd cell
21-3: the 3rd cell
22R: red color filter
22G: green color filter
22BL: blue color filter
31: information display panel
32: the information display area territory
33,34: input electrode
35: sealant formation portion
36: peristome
37: closure
41: parts are guaranteed to use in the gap
41a: linear pattern
41b: the pattern of curved shape
41c: dot pattern
41d: quadrangle patterns
51,52: connecting portion
Embodiment
At first, the basic structure with regard to information display panel of the present invention describes.In information display panel of the present invention, the display medium that is sealing between two substrates facing is mutually applied electric field.Along the direction of an electric field that is applied, attractions such as power that charged display medium is produced by electric field or Coulomb force, display medium moves according to the variation of direction of an electric field, thus the information that realizes image etc. shows.Therefore, information display panel must be designed to display medium moves equably, and can keep when rewriting display message again or the stability when showing shown information 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 image force between itself and electrode or the substrate, intermolecular force, liquid bridge power, gravity etc.
Based on Fig. 1 (a) and (b)～Figure 12, the example of information display panel of the present invention is described.
At Fig. 1 (a), (b) in the example shown in, in each cell that forms by next door 4, constitute by particle more than at least a kind, the different display medium more than at least 2 kinds 3 of optical reflectivity and charged characteristic (shown here is the white display medium 3W that is made of with the population of particle 3Wa white display medium and the black display medium 3B that is made of with the population of particle 3Ba the black display medium) is corresponding at the electrode 5 of being located at substrate 1 (single electrode) and be located at the electric field that applies voltage between the electrode 6 (single electrode) of substrate 2 and produce, with substrate 1,2 vertically move.So, shown in Fig. 1 (a), make the visible white display medium 3W of observer and carry out that white shows or shown in Fig. 1 (b), make observer's visible black color display medium 3B and carry out black display.In addition, in Fig. 1 (a) and (b), omitted the next door that is positioned at the front side.
At Fig. 2 (a), (b) in the example shown in, in each cell that forms by next door 4, constitute by particle more than at least a kind, the different display medium more than at least 2 kinds 3 of optical reflectivity and charged characteristic (shown here is the white display medium 3W that is made of with the population of particle 3Wa white display medium and the black display medium 3B that is made of with the population of particle 3Ba the black display medium) is corresponding to the electric field that applies voltage and produce between the electrode 5 (line electrode) of being located at substrate 1 and the electrode 6 (line electrode) of being located at substrate 2, with substrate 1,2 vertically move.So, shown in Fig. 2 (a), make the visible white display medium 3W of observer and carry out white and show; Perhaps shown in Fig. 2 (b), make observer's visible black color display medium 3B and carry out black display.In addition, in Fig. 2 (a) and (b), omitted the next door that is positioned at the front side.
In the example shown in Fig. 3 (a) and (b), in each cell that forms by next door 4, constitute by particle more than at least a kind, have an electric field that the display medium 3 (shown here is the white display medium 3W that is made of with the population of particle 3Wa white display medium) of optical reflectivity and charged characteristic produces corresponding to apply voltage between the electrode 5 of being located at substrate 1 and electrode 6 at least, move along the direction parallel with substrate 1,2.So, shown in Fig. 3 (a), make the visible white display medium 3W of observer and carry out white and show; Perhaps shown in Fig. 3 (b), make the color of observer's visible black color plate 7 and carry out black display.In addition, in the example shown in Fig. 3 (a) and (b), omitted the next door that is positioned at the front side.
In the example shown in Fig. 4 (a)～(d), at first, as Fig. 4 (a), (c) shown in, in each cell that forms by next door 4, constitute by particle more than at least a kind, the external electrical field that the different display medium more than at least 2 kinds 3 of optical reflectivity and charged characteristic (shown here is the white display medium 3W that is made of with the population of particle 3Wa white display medium and the black display medium 3B that is made of with the population of particle 3B a the black display medium) forms member 11 corresponding to the external electrical field in the outside of being located at substrate 1 and is located at the outside of substrate 2 forms the electric field that applies voltage between the member 12 and produce, with substrate 1,2 vertically move.So, shown in Fig. 4 (b), make the visible white display medium 3W of observer and carry out white and show; Perhaps shown in Fig. 4 (d), make observer's visible black color display medium 3B and carry out black display.In addition, in Fig. 4 (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.
In the example shown in Fig. 5 (a) and (b), show example by the colour demonstration of 3 cell component unit pixels.In the example shown in Fig. 5 (a) and (b), as display medium, in whole cell 21-1～21-3, fill white display medium 3W and black display medium 3B, observer's one side at the 1st cell 21-1 is provided with red color filter 22R, observer's one side at the 2nd cell 21-2 is provided with green color filter 22G, is provided with blue color filter 22BL in observer's one side of the 3rd cell 21-3; By the 1st cell 21-1, the 2nd cell 21-2 and these three cell component unit pixels of the 3rd cell 21-3.In the present example, shown in Fig. 5 (a), in the 1st whole cell 21-1～the 3rd cell 21-3,,, the observer shows thereby being carried out white by disposing white display medium 3W in observer's one side; Perhaps shown in Fig. 5 (b), in the 1st whole cell 21-1～the 3rd cell 21-3, pass through at observer's one side configuration black display medium 3W, thereby the observer is carried out black display.In addition, in Fig. 5 (a) and (b), omitted the next door that is positioned at the front side.
Above-mentioned explanation is equally applicable to will be replaced with by the white display medium 3W that population constitutes respectively the white medium that is made of powder fluid, will be replaced with the situation of the black display medium that is made of powder fluid by the black display medium 3B that population constitutes.
In Fig. 6 and example shown in Figure 7, illustrated with the example shown in Fig. 2 (a) and (b) and similarly used line electrode 5,6 to carry out another example of white black demonstration.In example shown in Figure 6, use is filled into the microcapsules 9 that inside forms with white display medium 3W, black display medium 3B with iknsulating liquid 8, the cell that is formed by next door 4 of replaced the filling shown in Fig. 2 (a), Fig. 2 (b) white display medium 3W and black display medium 3B.In addition, in example shown in Figure 7, use is whitewashed screw 10 half blacking, that polarity is also opposite with half and is filled into the microcapsules 9 that inside forms as display medium with iknsulating liquid 8, the cell that is formed by next door 4 of replaced the filling shown in Fig. 2 (a), Fig. 2 (b) white display medium 3W and black display medium 3B.Fig. 6 and arbitrary example shown in Figure 7 also can similarly carry out white black demonstration with the example shown in Fig. 2 (b).
What Fig. 8 represented is the structure of an example of information display panel of the present invention.Information display panel 31 shown in Fig. 8 is two substrates 1,2 are fitted and to constitute the information display area territory 32 (next door formation portion) of said structure between substrate 1,2.End at the substrate 1,2 in information display area territory 32 is respectively equipped with input electrode 33,34, and described input electrode is used for to applying the electrode power supply that electric field is used.In addition, the outer most edge portion between two substrates 1,2 around the information display area territory 32 is provided with sealant formation portion 35, and sealing agent formation portion uses the space between the sealant hermetic sealing substrate 1,2.Sealant formation portion 35 has peristome 36, the unnecessary gas in the panel, the unwanted gas that produced when making panel etc. can be discharged into the outside, after manufacturing is finished, with closure 37 closed peristomes 36, thereby obtains information display panel 11.
Information display panel 31 of the present invention is characterised in that: in the information display area territory 32 of information display panel 31 and be arranged between the sealant formation portion 15 of its outer edge, formed and the gap that a plurality of small size patterns form is set guarantees to make with parts 41.In example shown in Figure 8, shown in its partial enlarged drawing (part of the circle among the figure), use linear pattern 41a as the small size pattern, at the identical direction in each upper edge, limit a plurality of linear pattern 41a arranged side by side, guarantee with parts 41 thereby form the gap.Guarantee with parts 41 by such formation gap,, upset the factor in gap between substrate in the time of can't becoming multilayer board owing to it, therefore needn't remove for guaranteeing attached to the gap with the display medium on the part that does not have linear pattern 41a of parts 41.Therefore, only remove the display medium that remains on the linear pattern 41a and get final product, thereby the operation of removing of display medium becomes easy.
Fig. 9 is the figure that is used for a preferable example of linear pattern shown in the key diagram 8.Interval width between the line of linear pattern 41a shown in Fig. 9 is preferably wideer than the particle diameter of the particle that constitutes display medium.In addition, the live width of linear pattern 41a is preferably 5～100 μ m.Interval between the further preferred adjacent linear pattern 41a is identical with the live width of linear pattern 41a.Their relation can be considered the effect of two aspects and suitably decision, and the effect of described two aspects is meant as guaranteeing with the effect of the maintenance substrate of parts 41 and make display medium fall effect in the interval in the gap.
Figure 10 (a)～(h) is respectively the figure of an example of the small size pattern that is used for illustrating that information display panel of the present invention adopts.As the pattern of small size, can adopt shown in Figure 10 (a) guarantee along the gap with the length direction of parts 41 arrange the example of linear pattern 41a, shown in Figure 10 (b), guarantee along the gap with the pattern 41b of the length direction bent arrangement shape of parts 41 example, the example of a plurality of dot pattern 41c be set shown in Figure 10 (c), shown in Figure 10 (d), guarantee to arrange the different shapes such as example of a plurality of quadrangle patterns 41d with the length direction of parts 41 along the gap.In addition, can also adopt example, the example of shown in Figure 10 (f), using the pattern 41b of connecting portion 51 connection curved shapes of shown in Figure 10 (e), using connecting portion 51 connection linear pattern 41a, the different shapes such as example of shown in Figure 10 (g), using connecting portion 51,52 connection dot pattern 41c.In addition, also can use shown in Figure 10 (h) next door 4 that the next door in the viewing area is formed part to make example with the shape of linear pattern 41a one.
Figure 11 (a) and (b) are respectively the figure of another example of the pattern of the small size that is used for illustrating that information display panel of the present invention adopts.In the example shown in Figure 11 (a) and (b), the relation between the particle diameter of interval width between the line of linear pattern and display medium has been described.As the small size pattern, same with Figure 10 (a) in the example shown in Figure 11 (a), show the example of guaranteeing to arrange linear pattern 41a along the gap with the length direction of parts 41; In the example shown in Figure 11 (b), same with Figure 10 (b), show the example of guaranteeing along the gap with the pattern 41b of the length direction bent arrangement shape of parts 41.
In the example of Figure 11 (a), because the shape of line is a rectilinear form, which part of the interval between the line all is b.At this moment, when the particle diameter of the particle 3Ba that will constitute display medium is made as a,,, therefore can reduce the amount that the display medium 3 on the parts 41 is guaranteed to use in the gap that is carried on then because display medium 3 can fully be fallen compartment if set up the relation of a＜b.Thereby the cleaning process condition becomes easily, therefore, can realize the stabilization that guarantee in the gap in the substrate stamping procedure.With respect to this, in the example of Figure 11 (b), the shape of line is a polyline shaped, thereby interval width is different because of the position.Minimum at interval part is adjacent line part parallel to each other, is equivalent to the b among the figure.This value is with respect to the particle diameter a of the particle 3B a that constitutes display medium, if a＜b, then the situation with Figure 11 (a) is identical, and the particle 3Ba that constitutes display medium can fall compartment, and its result can realize the stabilization that guarantee in the gap in the substrate stamping procedure.
In addition, in Figure 11 (a) and (b),, in the example of situation about forming as one, also can expect same effect at the example of other linear pattern or with the next door though only represented 2 examples.
Below, guarantee to describe with regard to the gap with the manufacturing of parts 41.As manufacture method, can use photoetching process, mould transfer printing, silk screen print method, sand-blast.No matter which kind of method can preferably be used for information display panel of the present invention, but in these methods, the photoetching process of using etchant resist is best manufacture method.In addition, manufacturing process according to the information display area territory of making in the panel in the operation in next door 4 separate the needs that carry out and implement, but best method is to use with the next door identical materials and makes the gap simultaneously by same operation and guarantee method with parts 41.
Below, each parts that just constitute information display panel of the present invention describe.
About substrate, at least one substrate is the transparent substrate 2 that can observe the color of display medium 3 from the outside of panel, and its suitable material is 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 poly terephthalic acid diethylester, poly-naphthalenedicarboxylic acid diethylester, 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 not suitable as slim information display panel.
Electrode as the electrode that is provided with as required forms material, can metal species such as aluminium, silver, nickel, copper, gold be arranged illustration; Or conducting metal oxide class such as tin indium oxide (ITO), indium oxide, conductive tin oxide, antimony tin (ATO), 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 film shape ground 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.The electrode that is arranged on visual side (display surface side) substrate must be transparent, but the electrode that is arranged on the rear side substrate needs not to be transparent.Can be fit to use the above-mentioned material that all can form the electric conductivity of pattern in either case.In addition,, be suitably for 3～1000nm, be preferably 5～400nm as long as the thickness of electrode can be guaranteed electric conductivity, not hinder transmitance.The material that is arranged on the electrode on the rear side substrate can be identical with the above-mentioned electrode that is arranged on the display surface side group plate with thickness etc., but need not to be transparent.In addition, the external voltage input during this situation can overlapping direct current or interchange.
About being arranged on the next door 4 on the substrate as required, its shape can be according to shape, the setting of the kind of the display medium that is used to show, set electrode, carry out suitably optimization setting, 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 two substrates 1,2 of facing mutually, 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 12, to observe from the base plan direction, illustration has quadrilateral, triangle, wire, circle, hexagon; 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.
Wherein, if the formation method of counter septum is carried out example, can enumerate mould transfer printing, silk screen print method, sand-blast, photoetching process, additive process.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 information display panel of the present invention, just describe 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): accession designation number 4636931 ".
" powder fluid " among the present invention is self not demonstrate both material of intermediateness mobile, that have fluid and particle properties concurrently by the power of the power of gas or liquid.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.In addition, 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.Wherein, 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 particle is applied power upwards corresponding to gas velocity, 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 its state that flows 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, clear and definite can produce the power that need not by the power of such gas or liquid, the material that self demonstrates mobile state specifically, it is defined as powder fluid.
Promptly, powder fluid among the present invention is identical with the definition of liquid crystal (the middle phase of liquid and solid), be the intermediateness that has particle and liquid two characteristics concurrently, demonstrate the utmost point feel bad above-mentioned gravity as particle characteristics influence and have the material of the special state of high fluidity.Such material can be under aerosol state, promptly can be in gas as obtaining in the stably floating dispersed system that solid shape or liquid material arranged of dispersed substance, 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 the transparent substrate of facing mutually, for example enclose in gas as dispersed substance stably floating solids aerosol state and demonstrate the powder fluid of high fluidity.Such powder fluid is rich mobile, even can not measure the angle of repose as the index that shows powder fluidity, and is just can be easily the applying of low-voltage under 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, be need not by the power of gas or liquid power, self just demonstrate both material of intermediateness mobile, that have fluid and particle properties concurrently.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, the display medium that just constitutes display medium in information display panel of the present invention describes with particle (below be also referred to as particle).The display medium particle can be only be made of to constitute with as display medium or adjust and constitute powder fluid with as display medium as display medium or with other particle with particle this display medium.
In particle, in resin, as required, can comprise charge control agent, colorant, inorganic additive etc. 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 metal oxides such as ultra micron silicon dioxide, ultra micron titanium dioxide, ultra micron aluminium oxide; Nitrogenous ring compound such as pyridine and derivant or salt; The resins of various organic pigments, fluorine-containing, chlorine, nitrogen etc. etc. are 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, S naphthol yellow S-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, 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, be that ground barium sulfate, barium carbonate, clay, silicon dioxide, white carbon, talcum, aluminium oxide are 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 enumerate 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.
In addition, display medium of the present invention is with particle (below, be also referred to as particle), and its mean grain size d (0.5) is preferably in the scope of 0.1～20 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 the size distribution of each particle, 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, is 10% at the ratio of this particle below numerical value; D (0.9) is the grain diameter value of representing with μ m, 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 that uniform display medium moves.
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-irradiation 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.
Wherein, 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 nitrogen stream, add particle, adopt subsidiary analysis software (based on the software of the volume reference distribution of using the Mie theory), measure particle diameter and size distribution.
Display medium obviously depends on its condition determination with the carried charge of particle, as can be known in the information display panel display medium with the carried charge of particle depend on the initial strip electric weight substantially, with the contacting of next door, with the contacting of substrate, along with charge decay, the especially display medium in elapsed time are determinatives with the saturation value of the charged behavior of particle.
People of the present invention have carried out the result that studies intensively, find can estimate the scope of display medium with the suitable charged characteristic value of particle by using identical carrier particle to measure the carried charge of used particle in the display medium in blowing out (blowoff) method.
In addition, under the situation of the dry type information display panel that drives in the space that will be applied to by the display medium that display medium constitutes with particle in gas, it is important that the gas of gap that the display medium between substrate is surrounded 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 the 50%RH be important.
In Fig. 1 (a) and (b)～Fig. 3 (a) and (b), this gap is meant the gas part hermetic unit that occupies part, information display panel that occupies part, next door 4, so-called display medium contact 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 zone, 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 loading 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 space between the substrate of facing mutually, and more preferably 5～60%.Under 70% the situation of surpassing, can be to the mobile generation obstacle of display medium, under the situation of less than 5%, it is unintelligible that contrast becomes easily.
Industrial practicality
Information display panel of the present invention be suitable for notebook computer, electronic notebook, Be called as personal digital assistant (PDA, Personal Digital Assistants) just Take the display part of the removable machines such as formula information machine, portable phone, portable terminal; The electronic paper such as e-book, electronic newspaper; Billboard, placard, blackboard (blank) etc. Display board; The display part of desk top computer, household appliances, Automobile Products etc.; The card display part of some card (point card), IC-card etc.; E-advertising, information board, electricity Sub-POP (Point of presence, Point of Purchase advertising), The display part of electronics price tag, electronics bin tag, electronic music, RF-ID machine; In addition, the display part of the various e-machines such as POS terminal, auto navigation, clock and watch. In addition, also be applicable to and write again paper (can use external electrical field form member rewrite).
In addition, for the type of drive of information display panel of the present invention, can use as Lower described various types of type of drive: on the panel body, do not use switch element Simple matrix type of drive or switch drive mode and used with thin film transistor (TFT) (TFT) for three terminal switch elements of representative or take thin film diode (TFD) as generation The table the two-terminal switch element the active matrix drive mode, used external electrical field outside Section's electric field driven mode etc.
Claims (8)
1. information display panel, it encloses display medium between at least one side is transparent two substrates facing mutually, by display medium being applied electric field display medium is moved, thereby information such as display image, it is characterized in that, in the information display area territory of panel and be arranged between the sealant formation portion of its outer edge, formed and the gap that a plurality of small size patterns form is set guarantees to use parts.
2. information display panel, it encloses display medium between at least one side is transparent two substrates facing mutually, by display medium being applied electric field display medium is moved, thereby information such as display image, it is characterized in that, in the information display area territory of panel and be arranged between the sealant formation portion of its outer edge, form the gap and guaranteed to use parts, described gap guarantees to be made of the shape that the whole patterns that make many small size patterns or a part of pattern are connected with parts.
3. information display panel according to claim 1 and 2 is characterized in that, described gap guarantees that with the partition pattern in the pattern of parts and the information display area territory be the shape of one.
4. according to each described information display panel in the claim 1～3, it is characterized in that, described gap guaranteed to be made as linear pattern with the small size pattern of parts that a plurality of side by side linear pattern of extending along equidirectional guarantee to use parts and constitute the gap.
5. information display panel according to claim 4 is characterized in that, the interval width between the line of described linear pattern is wideer than the particle diameter of the particle that constitutes display medium.
6. information display panel according to claim 4 is characterized in that, the live width of linear pattern is 5～100 μ m.
7. according to each described information display panel in the claim 4～6, it is characterized in that the interval between the adjacent line is identical with live width.
8. the manufacture method of an information display panel, it is a method of making each described information display panel in the claim 1～7, it is characterized in that the material identical materials in the next door in the field of information display of use and formation panel is also made the gap simultaneously by same operation and guaranteed to use parts.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
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| JP2005281910 | 2005-09-28 | ||
| JP2005281910 | 2005-09-28 | ||
| JP2006257201 | 2006-09-22 |
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| CN1940691A true CN1940691A (en) | 2007-04-04 |
| CN100510925C CN100510925C (en) | 2009-07-08 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101910933B (en) * | 2007-12-25 | 2012-07-25 | 株式会社普利司通 | Information display panel and method for manufacturing information display panel |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2002103661A1 (en) * | 2001-06-19 | 2002-12-27 | International Business Machines Corporation | Display unit and production method for display unit |
| KR100652045B1 (en) * | 2001-12-21 | 2006-11-30 | 엘지.필립스 엘시디 주식회사 | A Liquid Crystal Display Device And The Method For Manufacturing The Same |
| WO2003071347A1 (en) * | 2002-02-19 | 2003-08-28 | Koninklijke Philips Electronics N.V. | Display device |
| US7179512B2 (en) * | 2002-05-14 | 2007-02-20 | Fujitsu Limited | Liquid crystal display and manufacturing method of same |
| JP4024172B2 (en) * | 2003-03-19 | 2007-12-19 | 株式会社日立製作所 | Electrophoretic display device and manufacturing method |
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| CN101910933B (en) * | 2007-12-25 | 2012-07-25 | 株式会社普利司通 | Information display panel and method for manufacturing information display panel |
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