WO2010067582A1 - 情報表示用パネルの駆動方法 - Google Patents
情報表示用パネルの駆動方法 Download PDFInfo
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- WO2010067582A1 WO2010067582A1 PCT/JP2009/006691 JP2009006691W WO2010067582A1 WO 2010067582 A1 WO2010067582 A1 WO 2010067582A1 JP 2009006691 W JP2009006691 W JP 2009006691W WO 2010067582 A1 WO2010067582 A1 WO 2010067582A1
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- WIPO (PCT)
- Prior art keywords
- voltage
- information
- display panel
- information image
- information display
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/3433—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using light modulating elements actuated by an electric field and being other than liquid crystal devices and electrochromic devices
- G09G3/344—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using light modulating elements actuated by an electric field and being other than liquid crystal devices and electrochromic devices based on particles moving in a fluid or in a gas, e.g. electrophoretic devices
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2310/00—Command of the display device
- G09G2310/06—Details of flat display driving waveforms
- G09G2310/061—Details of flat display driving waveforms for resetting or blanking
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2310/00—Command of the display device
- G09G2310/06—Details of flat display driving waveforms
- G09G2310/068—Application of pulses of alternating polarity prior to the drive pulse in electrophoretic displays
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0257—Reduction of after-image effects
Definitions
- the present invention is formed by enclosing at least two types of display media configured as a particle group including a chargeable particle between two opposing substrates, at least one of which is transparent, and opposingly arranging conductive films provided on each substrate.
- the present invention relates to a method for driving an information display panel in which a voltage is applied between a pair of opposed pixel electrodes and a display medium is moved to display an information image, and in particular, when an information image displayed on the information display panel is erased
- the present invention relates to a method for driving an information display panel used in the above.
- “drawing” means displaying an information image
- “erasing” means displaying a solid image once before drawing.
- a pair of opposed pixel electrodes formed by encapsulating a display medium configured as a particle group including a chargeable particle between two opposing substrates, at least one of which is transparent, and a conductive film provided on each of the substrates is arranged to face each other.
- Various methods are known as a method for driving an information display panel that displays information such as an image by applying a voltage between them to drive a display medium.
- FIGS. 7A and 7B are diagrams for explaining an example of the conventional driving method described above.
- FIG. 7A shows a voltage waveform applied to the panel
- FIG. 7B shows a cross section of the panel and a schematic diagram of the voltage applied to the panel.
- a voltage V 1 that is equal to or higher than a threshold voltage V 0 for applying an electric field that can be driven by overcoming the adhesive force with the substrate surface by the chargeable particles constituting the display medium is applied.
- the object of the present invention is to solve the above-mentioned problems, and for information display that can sufficiently erase the history of previously displayed information images without causing a decrease in display rewrite life and an increase in power consumption. It is an object of the present invention to provide a panel driving method.
- At least two kinds of display media configured as a particle group including a chargeable particle are sealed between two opposing substrates, at least one of which is transparent, and each substrate is provided.
- An information image displayed on an information display panel in a method for driving an information display panel in which a voltage is applied between opposed pixel electrode pairs formed by arranging conductive films to face each other and a display medium is moved to display an information image.
- the information image is erased by combining the application of an alternating voltage and the application of a positive or negative continuous voltage for two or more periods.
- alternating voltage when applying information in order to erase the information image, and applying the negative voltage to erase the information image before drawing the image, positive voltage application and alternating voltage application for two cycles or more are performed in order.
- positive voltage application and alternating voltage application for two cycles or more are performed in order.
- the positive voltage when erasing before drawing the information image, applying the positive voltage, the alternating voltage is applied, and the negative voltage is applied for two or more cycles in order to erase the information image.
- an alternating voltage is applied, and a positive voltage is applied for two cycles or more in order to erase the information image.
- an alternating voltage application, a negative voltage application for two cycles or more, and an alternating voltage application are sequentially performed to erase the information image, and a negative voltage is applied.
- an alternating voltage application, a positive voltage application of two cycles or more, and an alternating voltage application are sequentially performed to erase the information image, and a positive voltage is applied.
- the information image is erased by sequentially applying the positive voltage application for two cycles or more, the alternating voltage application, the negative voltage application for two cycles or more, and the negative voltage.
- the information image when erasing an information image displayed on the information display panel, the information image is erased by combining the application of an alternating voltage and the application of a positive or negative continuous voltage for two or more cycles.
- a method for driving the information display panel that can sufficiently erase the history of the previously displayed information image without causing a decrease in display rewrite life or an increase in power consumption.
- (A), (b) is a figure for demonstrating an example of the information display panel used as the object of the drive method of this invention, respectively.
- (A), (b) is a figure for demonstrating the other example of the information display panel used as the object of the drive method of this invention, respectively.
- (A), (b) is a figure for demonstrating an example of the conventional drive method, respectively.
- the configuration of the information display panel that is the target of the driving method of the present invention will be described.
- an electric field is applied to a display medium configured as a particle group including a chargeable particle sealed between two opposing substrates.
- the display medium is attracted by an electric field force or a Coulomb force, and the display medium is moved by a change in the electric field direction, whereby information such as an image is displayed. Therefore, it is necessary to design the information display panel so that the display medium can move uniformly and maintain the stability when the display information is rewritten or when the display information is continuously displayed.
- the force applied to the particles constituting the display medium in addition to the force attracting each other by the Coulomb force between the particles, an electric mirror image force between the electrode and the substrate, an intermolecular force, a liquid cross-linking force, gravity and the like can be considered.
- the white display medium 3W configured as a particle group including the negatively charged white particles 3Wa and the black display medium 3B configured as a particle group including the positively charged black particles 3Ba are shown).
- the white display medium 3W configured as a particle group including the negatively charged white particles 3Wa and the black display medium 3B configured as a particle group including the positively charged black particles 3Ba are shown).
- the white display medium 3W is visually recognized by the observer as shown in FIG.
- the black display medium 3B is visually recognized by the observer as shown in FIG. 1B.
- the partition in front is abbreviate
- the white display medium 3W configured as a particle group including the negatively charged white particles 3Wa and the black display medium 3B configured as a particle group including the positively charged black particles 3Ba are shown).
- the substrate 1, 2 corresponds to an electric field generated by applying a voltage to a pixel electrode pair formed by the line electrode 6 provided on the substrate 2 and the line electrode 5 provided on the substrate 1 facing each other. And move vertically. Then, the white display medium 3W is visually recognized by the observer as shown in FIG.
- the white display is displayed by the observer, or the black display medium 3B is visually recognized by the observer as shown in FIG. 2B.
- the partition in front is abbreviate
- the driving method of the present invention is characterized in that in the information display panel having the above-described structure, when an information image displayed on the information display panel is erased, an alternating voltage is applied and a positive or negative voltage continuous for two cycles or more. The point is that the information image is erased in combination with the application of.
- the timing of applying the positive or negative voltage may be any of before, after, during, or in combination with the alternating voltage.
- the voltage waveform of the positive or negative voltage applied continuously for two cycles or more is not particularly limited, such as a rectangular wave, a trapezoidal wave, a sin wave, and a triangular wave. In order to sufficiently erase the previously displayed information image. A square wave is most effective. The amplitude, period, and number of repetitions of the voltage waveform do not need to be constant. Note that the driving method of the present invention can be applied to either passive driving or active driving. The voltage at the time of erasing may be applied to the entire panel surface or may be applied partially.
- the voltage waveform of the applied positive or negative voltage is limited to “two or more cycles” for the following reason. That is, compared to the case where a voltage of one cycle is applied, the case where a voltage of two cycles or more is continuously applied is to make it easier to separate the particle group in the panel into individual particles.
- a voltage is applied, particles having different charging polarities try to move in opposite directions in the panel, and thus collide with each other before reaching the counter electrode.
- particles collide with each other they stick to each other or come back, and there are particles that cannot reach the counter electrode. As a result, the particles are sufficiently separated into individual particles. Can not.
- the upper limit is not particularly limited as long as it is two periods or more from the viewpoint of sufficiently erasing the history of the information image displayed previously, but the effect becomes constant as the period increases, Moreover, since power consumption also increases, it is preferable to set it to about 30 cycles.
- the information display panel uses two types of display media: a display medium configured as a particle group including positively charged particles and a display medium configured as a particle group including negatively charged particles.
- a display medium configured as a particle group including positively charged particles and a display medium configured as a particle group including negatively charged particles.
- the combination of the alternating voltage and the positive or negative voltage of two or more cycles is not limited to this.
- FIG. 3 is a diagram for explaining an example of a voltage waveform in the method for driving the information display panel of the present invention.
- the positive electrode voltage that is, the voltage at which the observation-side electrode is positive with respect to the back-side electrode with respect to the observation-side electrode constituting the information display panel (for example, the observation-side electrode).
- Is + V 1 (V) and the electrode on the back side is 0 (V)).
- V 1 is a voltage value larger than the threshold voltage V 0 applied to generate an electric field sufficient to drive the chargeable particles serving as the display medium.
- a negative voltage of two cycles or more is first applied, and then an alternating voltage is applied.
- the application of the negative electrode voltage refers to a voltage at which the observation-side electrode is negative with respect to the back-side electrode with respect to the observation-side electrode constituting the information display panel (for example, the observation-side electrode is ⁇ V 1 (V) means that the electrode on the back side applies 0 (V)).
- the alternating voltage refers to a voltage in which a positive voltage and a negative voltage appear alternately and continuously.
- drawing is performed by applying a positive voltage.
- FIG. 4 is a diagram for explaining another example of the voltage waveform in the method for driving the information display panel of the present invention.
- the example shown in FIG. 4 shows an example in which drawing is performed by applying a positive voltage.
- drawing is performed by applying a positive voltage.
- FIG. 5 is a diagram for explaining still another example of the voltage waveform in the method for driving the information display panel of the present invention.
- the example shown in FIG. 5 shows an example in which drawing is performed by applying a positive voltage.
- an alternating voltage is first applied, then a negative voltage of two cycles or more is applied, and then an alternating voltage is applied.
- FIG. 6 is a diagram for explaining still another example of the voltage waveform in the method for driving the information display panel of the present invention.
- the example shown in FIG. 6 shows an example in which drawing is performed by applying a positive voltage.
- a positive voltage of two cycles or more is applied, then an alternating voltage is applied, and then a negative voltage of two cycles or more is applied. Yes.
- the shape of the pulse voltage is a rectangular wave, but other shapes such as a trapezoidal wave, a sin wave, and a triangular wave may be used.
- the level of each pulse voltage, the time during which each pulse voltage is applied (referred to as ON time), and the time during which each pulse voltage is not applied (referred to as OFF time) are all the same, they may be changed individually.
- the drawing is performed by applying the positive voltage, the drawing can also be performed by applying the negative voltage.
- the substrate As the substrate, at least one of the substrates is a transparent substrate on which the display medium can be confirmed from the outside of the panel, and a material having high visible light transmittance and good heat resistance is preferable.
- the back substrate as the other substrate may be transparent or opaque.
- substrate materials include polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polyethylene (PE), polycarbonate (PC), polyimide (PI), polyethersulfine (PES), and organic organic polymer substrates such as acrylic.
- PET polyethylene terephthalate
- PEN polyethylene naphthalate
- PE polyethylene
- PC polycarbonate
- PI polyimide
- PES polyethersulfine
- organic organic polymer substrates such as acrylic.
- a glass sheet, a quartz sheet, a metal sheet coated with an insulating film, or the like is used, and a transparent one is used on the display surface side.
- the thickness of the substrate is preferably 2 to 2000 ⁇ m, more preferably 5
- Electrode forming materials include metals such as aluminum, silver, nickel, copper and gold, indium tin oxide (ITO), indium zinc oxide (IZO), aluminum-doped zinc oxide (AZO), indium oxide, and conductive tin oxide.
- ITO indium tin oxide
- IZO indium zinc oxide
- AZO aluminum-doped zinc oxide
- conductive tin oxide examples thereof include conductive metal oxides such as antimony tin oxide (ATO) and conductive zinc oxide, and conductive polymers such as polyaniline, polypyrrole and polythiophene, which are appropriately selected and used.
- a method for forming the electrode a method of patterning the above-described materials into a thin film by a sputtering method, a vacuum deposition method, a CVD (chemical vapor deposition) method, a coating method, or the like, or a metal foil (for example, a rolled copper foil) is laminated.
- a method or a method of patterning by mixing and applying a conductive agent to a solvent or a synthetic resin binder is used.
- the electrode provided on the viewing side (display surface side) substrate needs to be transparent, but the electrode provided on the back side substrate does not need to be transparent.
- the above-mentioned material that is conductive and capable of pattern formation can be suitably used.
- the electrode thickness is determined in view of conductivity and light transmittance, and is 0.01 to 10 ⁇ m, preferably 0.05 to 5 ⁇ m.
- the material and thickness of the electrode provided on the back substrate need not be considered in light transmittance.
- the shape of the partition provided on the substrate according to need is appropriately set appropriately depending on the type of display medium involved in display, the shape and arrangement of electrodes to be arranged, and is not limited in general, but the width of the partition is 2 to 100 ⁇ m.
- the height of the partition walls is preferably adjusted to 3 to 50 ⁇ m, and the height of the partition wall is adjusted to 10 to 500 ⁇ m, preferably 10 to 200 ⁇ m.
- the height of the partition wall arranged for securing the inter-substrate gap is matched with the inter-substrate gap to be secured.
- the height of the partition wall arranged to partition the inter-substrate space into cells may be the same as or lower than the inter-substrate gap.
- a both-rib method in which ribs are formed on each of the opposing substrates 1 and 2 and then bonded, and a single-rib method in which ribs are formed only on one substrate are conceivable. Any method is used in the present invention.
- the cells formed by the partition walls made of these ribs are exemplified by a square shape, a triangular shape, a line shape, a circular shape, and a hexagonal shape when viewed from the substrate plane direction, and the arrangement is exemplified by a lattice shape, a honeycomb shape, or a mesh shape.
- examples of the method for forming the partition include a mold transfer method, a screen printing method, a sand blast method, a photolithography method, and an additive method. Any of these methods can be suitably used for an information display panel mounted on the information display device of the present invention, and among these, a photolithography method using a resist film and a mold transfer method are suitably used.
- the chargeable particles included in the particle group used as the display medium in the present invention will be described.
- the chargeable particles are used as they are as a display medium by forming a particle group using only the chargeable particles, or by forming a particle group together with other particles.
- the chargeable particles can contain a charge control agent, a colorant, an inorganic additive, and the like, if necessary, in the resin as the main component. Examples of resins, charge control agents, colorants, and other additives will be given below.
- the resin examples include urethane resin, urea resin, acrylic resin, polyester resin, acrylic urethane resin, acrylic urethane silicone resin, acrylic urethane fluororesin, acrylic fluororesin, silicone resin, acrylic silicone resin, epoxy resin, polystyrene resin, styrene Acrylic resin, polyolefin resin, butyral resin, vinylidene chloride resin, melamine resin, phenol resin, fluororesin, polycarbonate resin, polysulfone resin, polyether resin, polyamide resin and the like can be mentioned, and two or more kinds can be mixed.
- acrylic urethane resin, acrylic silicone resin, acrylic fluororesin, acrylic urethane silicone resin, acrylic urethane fluororesin, fluororesin, and silicone resin are suitable from the viewpoint of controlling the adhesive force with the substrate.
- the charge control agent is not particularly limited.
- the negative charge control agent include salicylic acid metal complexes, metal-containing azo dyes, metal-containing oil-soluble dyes (including metal ions and metal atoms), and quaternary ammonium salt systems. Examples thereof include compounds, calixarene compounds, boron-containing compounds (benzyl acid boron complexes), and nitroimidazole derivatives.
- the positive charge control agent include nigrosine dyes, triphenylmethane compounds, quaternary ammonium salt compounds, polyamine resins, imidazole derivatives, and the like.
- metal oxides such as ultrafine silica, ultrafine titanium oxide, ultrafine alumina, nitrogen-containing cyclic compounds such as pyridine and derivatives and salts thereof, various organic pigments, resins containing fluorine, chlorine, nitrogen, etc. are also charged. It can also be used as a control agent.
- colorant various organic or inorganic pigments and dyes as exemplified below can be used.
- black colorant examples include carbon black, copper oxide, manganese dioxide, aniline black, activated carbon and the like.
- blue colorants include C.I. I. Pigment blue 15: 3, C.I. I. Pigment Blue 15, Bituminous Blue, Cobalt Blue, Alkaline Blue Lake, Victoria Blue Lake, Phthalocyanine Blue, Metal-free Phthalocyanine Blue, Phthalocyanine Blue Partial Chlorides, Fast Sky Blue, Indanthrene Blue BC, and the like.
- red colorants include bengara, cadmium red, red lead, mercury sulfide, cadmium, permanent red 4R, risor red, pyrazolone red, watching red, calcium salt, lake red D, brilliant carmine 6B, eosin lake, rhodamine lake B, Alizarin Lake, Brilliant Carmine 3B, C.I. I. Pigment Red 2 etc.
- Yellow colorants include yellow lead, zinc yellow, cadmium yellow, yellow iron oxide, mineral first yellow, nickel titanium yellow, navel yellow, naphthol yellow S, Hansa Yellow G, Hansa Yellow 10G, Benzidine Yellow G, Benzidine Yellow GR, Quinoline Yellow Lake, Permanent Yellow NCG, Tartrazine Lake, C.I. I. Pigment Yellow 12 etc.
- green colorants include chrome green, chromium oxide, pigment green B, C.I. I. Pigment Green 7, Malachite Green Lake, Final Yellow Green G, etc.
- orange colorant examples include red chrome yellow, molybdenum orange, permanent orange GTR, pyrazolone orange, Vulcan orange, indanthrene brilliant orange RK, benzidine orange G, indanthrene brilliant orange GK, C.I. I. Pigment Orange 31 etc.
- purple colorants include manganese purple, first violet B, and methyl violet lake.
- white colorants include zinc white, titanium oxide, antimony white, and zinc sulfide.
- extender pigments examples include barite powder, barium carbonate, clay, silica, white carbon, talc, and alumina white.
- various dyes such as basic, acidic, disperse, and direct dyes include nigrosine, methylene blue, rose bengal, quinoline yellow, and ultramarine blue.
- inorganic additives include titanium oxide, zinc white, zinc sulfide, antimony oxide, calcium carbonate, lead white, talc, silica, calcium silicate, alumina white, cadmium yellow, cadmium red, cadmium orange, titanium yellow, Examples include bitumen, ultramarine blue, cobalt blue, cobalt green, cobalt violet, iron oxide, carbon black, manganese ferrite black, cobalt ferrite black, copper powder, and aluminum powder. These pigments and inorganic additives can be used alone or in combination. Of these, carbon black is particularly preferable as the black pigment, and titanium oxide is preferable as the white pigment. The above colorant can be blended to produce chargeable particles of a desired color.
- the chargeable particles (hereinafter also referred to as particles) have an average particle diameter d (0.5) in the range of 1 to 20 ⁇ m and are uniform. If the average particle diameter d (0.5) is larger than this range, the display is not clear. If the average particle diameter d (0.5) is smaller than this range, the cohesive force between the particles becomes too large, which hinders movement as a display medium.
- the particle size distribution Span represented by the following formula is less than 5, preferably less than 3.
- Span (d (0.9) ⁇ d (0.1)) / d (0.5)
- d (0.5) is a numerical value indicating the particle diameter in ⁇ m that 50% of the particles are larger than this and 50% is smaller than this
- d (0.1) is a particle in which the ratio of the smaller particles is 10%.
- Numerical value expressed in ⁇ m and d (0.9) is a numerical value expressed in ⁇ m for a particle diameter of 90% or less.
- the particle size distribution and the particle size can be obtained from a laser diffraction / scattering method or the like.
- a light intensity distribution pattern of diffracted / scattered light is spatially generated, and this light intensity pattern has a corresponding relationship with the particle diameter, so that the particle diameter and particle diameter distribution can be measured.
- the particle size and the particle size distribution are obtained from a volume-based distribution. Specifically, using a Mastersizer2000 (Malvern Instruments Ltd.) measuring instrument, particles are introduced into a nitrogen stream, and the attached analysis software (software based on volume-based distribution using Mie theory) The diameter and particle size distribution can be measured.
- the relative humidity at 25 ° C. is 60% RH or less, and preferably 50% RH or less for the humidity of the gas in the gap.
- This gap portion refers to electrodes 5 and 6 (electrodes inside the substrate from the portion sandwiched between the opposing substrate 1 and substrate 2 in FIGS. 1 (a), 1 (b) to 2 (a), 2 (b).
- the gas in the gap is not limited as long as it is in the humidity region described above, but dry air, dry nitrogen, dry argon, dry helium, dry carbon dioxide, dry methane, and the like are preferable.
- This gas needs to be sealed in the panel so that the humidity is maintained.
- the display medium is filled and the panel is assembled in a predetermined humidity environment. It is important to apply a sealing material and a sealing method to prevent it.
- the distance between the substrates in the information display panel targeted by the present invention is not limited as long as the display medium can be driven and the contrast can be maintained, but is usually adjusted to 2 to 500 ⁇ m, preferably 5 to 200 ⁇ m.
- the distance between the substrates is adjusted in the range of 10 to 100 ⁇ m, preferably 10 to 50 ⁇ m.
- the volume occupation ratio of the display medium in the gas space between the substrates is preferably 5 to 70%, more preferably 5 to 60%. When it exceeds 70%, the movement of particles as a display medium is hindered, and when it is less than 5%, the contrast tends to be unclear.
- the charged particles are sealed in a microcapsule together with an insulating liquid, and the microcapsule is arranged between a pair of counter electrodes.
- the present invention can also be applied to driving various information display panels.
- An information display panel that is an object of the present invention includes a display unit of a mobile device such as a notebook computer, a PDA, a mobile phone, and a handy terminal, an electronic paper such as an electronic book, an electronic newspaper, and an electronic manual (instruction manual), a signboard, Poster, blackboard and other bulletin boards, calculators, home appliances, automotive supplies, card displays such as point cards, IC cards, electronic advertisements, electronic point of purchase (POP), electronic points, electronic price tags, electronic It is suitably used as a display unit (so-called rewritable paper) that performs display rewriting by connecting to a shelf label, electronic score, RF-ID device display unit, or external display rewriting means.
- a display unit such as a notebook computer, a PDA, a mobile phone, and a handy terminal
- an electronic paper such as an electronic book, an electronic newspaper, and an electronic manual (instruction manual)
- a signboard, Poster, blackboard and other bulletin boards calculators
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Abstract
Description
なお、本発明において、「描画」とは情報画像を表示することを意味するとともに、「消去」とは描画を行う前に一旦ベタ画像を表示することを意味する。
また、隔壁を形成するにあたり、対向する両基板1、2の各々にリブを形成した後に接合する両リブ法、片側の基板上にのみリブを形成する片リブ法が考えられる。この発明では、いずれの方法も用いられる。
これらのリブからなる隔壁により形成されるセルは、基板平面方向からみて四角状、三角状、ライン状、円形状、六角状が例示され、配置としては格子状やハニカム状や網目状が例示される。表示面側から見える隔壁断面部分に相当する部分(セルの枠部の面積)はできるだけ小さくした方が良く、表示状態の鮮明さが増す。
ここで、隔壁の形成方法を例示すると、金型転写法、スクリーン印刷法、サンドブラスト法、フォトリソ法、アディティブ法が挙げられる。いずれの方法もこの発明の情報表示装置に搭載する情報表示用パネルに好適に用いることができるが、これらのうち、レジストフィルムを用いるフォトリソ法や金型転写法が好適に用いられる。
帯電性粒子には、その主成分となる樹脂に、必要に応じて、荷電制御剤、着色剤、無機添加剤等を含ますことができる。以下に、樹脂、荷電制御剤、着色剤、その他添加剤を例示する。
青色着色剤としては、C.I.ピグメントブルー15:3、C.I.ピグメントブルー15、紺青、コバルトブルー、アルカリブルーレーキ、ビクトリアブルーレーキ、フタロシアニンブルー、無金属フタロシアニンブルー、フタロシアニンブルー部分塩素化物、ファーストスカイブルー、インダンスレンブルーBC等がある。
赤色着色剤としては、ベンガラ、カドミウムレッド、鉛丹、硫化水銀、カドミウム、パーマネントレッド4R、リソールレッド、ピラゾロンレッド、ウォッチングレッド、カルシウム塩、レーキレッドD、ブリリアントカーミン6B、エオシンレーキ、ローダミンレーキB、アリザリンレーキ、ブリリアントカーミン3B、C.I.ピグメントレッド2等がある。
緑色着色剤としては、クロムグリーン、酸化クロム、ピグメントグリーンB、C.I.ピグメントグリーン7、マラカイトグリーンレーキ、ファイナルイエローグリーンG等がある。
橙色着色剤としては、赤色黄鉛、モリブデンオレンジ、パーマネントオレンジGTR、ピラゾロンオレンジ、バルカンオレンジ、インダンスレンブリリアントオレンジRK、ベンジジンオレンジG、インダンスレンブリリアントオレンジGK、C.I.ピグメントオレンジ31等がある。
紫色着色剤としては、マンガン紫、ファーストバイオレットB、メチルバイオレットレーキ等がある。
白色着色剤としては、亜鉛華、酸化チタン、アンチモン白、硫化亜鉛等がある。
これらの顔料および無機系添加剤は、単独であるいは複数組み合わせて用いることができる。このうち特に黒色顔料としてカーボンブラックが、白色顔料として酸化チタンが好ましい。上記着色剤を配合して所望の色の帯電性粒子を作製できる。
Span=(d(0.9)-d(0.1))/d(0.5)
(但し、d(0.5)は粒子の50%がこれより大きく、50%がこれより小さいという粒子径をμmで表した数値、d(0.1)はこれ以下の粒子の比率が10%である粒子径をμmで表した数値、d(0.9)はこれ以下の粒子が90%である粒子径をμmで表した数値である。)
Spanを5以下の範囲に納めることにより、帯電性粒子のサイズが揃い、均一な表示媒体としての移動が可能となる。
ここで、粒子径および粒子径分布は、体積基準分布から得られたものである。具体的には、Mastersizer2000(Malvern Instruments Ltd.)測定機を用いて、窒素気流中に粒子を投入し、付属の解析ソフト(Mie理論を用いた体積基準分布を基本としたソフト)にて、粒子径および粒子径分布の測定を行なうことができる。
この空隙部分とは、図1(a)、(b)~図2(a)、(b)において、対向する基板1、基板2に挟まれる部分から、電極5、6(電極を基板の内側に設けた場合)、表示媒体3の占有部分、隔壁4の占有部分(隔壁を設けた場合)、パネルのシール部分を除いた、いわゆる表示媒体が接する気体部分を指すものとする。
空隙部分の気体は、先に述べた湿度領域であれば、その種類は問わないが、乾燥空気、乾燥窒素、乾燥アルゴン、乾燥ヘリウム、乾燥二酸化炭素、乾燥メタンなどが好適である。この気体は、その湿度が保持されるようにパネルに封入することが必要であり、例えば、表示媒体の充填、パネルの組み立てなどを所定湿度環境下にて行い、さらに、外からの湿度侵入を防ぐシール材、シール方法を施すことが肝要である。
情報表示用パネルを帯電粒子気体中空間移動方式とする場合は、基板と基板との間隔は10~100μm、好ましくは10~50μmの範囲で調整される。さらに、基板間の気体中空間における表示媒体の体積占有率は5~70%が好ましく、さらに好ましくは5~60%である。70%を超える場合には表示媒体としての粒子の移動に支障をきたし、5%未満の場合にはコントラストが不明確となり易い。
帯電性粒子を移動させて表示する方式には、この帯電性粒子を絶縁液体とともにマイクロカプセルに封止し、このマイクロカプセルを対向電極対間に配置したものもあるが、本発明は、このような方式の情報表示用パネルの駆動にも適用できる。
Claims (5)
- 少なくとも一方が透明な対向する2枚の基板間に帯電性粒子を含んだ粒子群として構成した表示媒体を少なくとも2種類封入し、各基板に設けた導電膜を対向配置して形成した対向画素電極対間に電圧を印加し、表示媒体を移動させて情報画像を表示する情報表示用パネルの駆動方法において、情報表示用パネルに表示された情報画像を消去する際、交番電圧の印加と2周期以上の連続した正極または負極の電圧の印加とを組み合わせて前記情報画像を消去することを特徴とする情報表示用パネルの駆動方法。
- 第1の極性の電圧を印加することにより実施する情報画像を描画する前の消去の際、2周期以上の第2の極性の電圧印加、交番電圧印加を順に実施して情報画像を消去することを特徴とする請求項1に記載の情報表示用パネルの駆動方法。
- 第1の極性の電圧を印加することにより実施する情報画像を描画する前の消去の際、交番電圧印加、2周期以上の第2の極性の電圧印加を順に実施して情報画像を消去することを特徴とする請求項1に記載の情報表示用パネルの駆動方法。
- 第1の極性の電圧を印加することにより実施する情報画像を描画する前の消去の際、交番電圧印加、2周期以上の第2の極性の電圧印加、交番電圧印加を順に実施して情報画像を消去することを特徴とする請求項1に記載の情報表示用パネルの駆動方法。
- 第1の極性の電圧を印加することにより実施する情報画像を描画する前の消去の際、2周期以上の第1の極性の電圧印加、交番電圧印加、2周期以上の第2の極性の電圧印加を順に実施して情報画像を消去することを特徴とする請求項1に記載の情報表示用パネルの駆動方法。
Priority Applications (4)
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EP09831689A EP2357635A4 (en) | 2008-12-12 | 2009-12-08 | METHOD FOR CONTROLLING AN INFORMATION DISPLAY PANEL |
CN2009801566837A CN102317997A (zh) | 2008-12-12 | 2009-12-08 | 信息显示用面板的驱动方法 |
US13/139,176 US20110242081A1 (en) | 2008-12-12 | 2009-12-08 | Method of driving information display panel |
BRPI0923319A BRPI0923319A2 (pt) | 2008-12-12 | 2009-12-08 | método para acionar painel de exibição de informação |
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JP2008317034A JP2010139851A (ja) | 2008-12-12 | 2008-12-12 | 情報表示用パネルの駆動方法 |
JP2008-317034 | 2008-12-12 |
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US (1) | US20110242081A1 (ja) |
EP (1) | EP2357635A4 (ja) |
JP (1) | JP2010139851A (ja) |
CN (1) | CN102317997A (ja) |
BR (1) | BRPI0923319A2 (ja) |
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JP6235196B2 (ja) * | 2012-05-31 | 2017-11-22 | イー インク コーポレイション | 表示媒体の駆動装置、駆動プログラム、及び表示装置 |
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JP2003005227A (ja) | 2001-06-20 | 2003-01-08 | Fuji Xerox Co Ltd | 画像表示装置及び表示駆動方法 |
JP2007507727A (ja) * | 2003-09-29 | 2007-03-29 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | 適切な階調及び自然な画像更新を伴う双安定ディスプレイ |
JP2007507738A (ja) * | 2003-10-03 | 2007-03-29 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | 電気泳動ディスプレイユニット |
JP2007523375A (ja) * | 2004-02-19 | 2007-08-16 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | 表示ユニット |
JP2008164862A (ja) * | 2006-12-27 | 2008-07-17 | Mitsubishi Pencil Co Ltd | 電気泳動表示装置、制御装置、制御方法、および表示システム |
JP2008224890A (ja) * | 2007-03-09 | 2008-09-25 | Mitsubishi Pencil Co Ltd | 電気泳動表示装置、制御装置、制御方法、および表示システム |
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WO2005004101A1 (en) * | 2003-07-04 | 2005-01-13 | Koninklijke Philips Electronics N.V. | Electrophoretic display panel |
TW200511178A (en) * | 2003-08-25 | 2005-03-16 | Koninkl Philips Electronics Nv | Method of compensating image instability and improving greyscale accuracy for electrophoretic displays |
EP1665215A1 (en) * | 2003-09-18 | 2006-06-07 | Koninklijke Philips Electronics N.V. | Temperature compensation method for bi-stable display using drive sub-pulses |
WO2007080964A1 (ja) * | 2006-01-13 | 2007-07-19 | Brother Kogyo Kabushiki Kaisha | 電気泳動表示装置 |
-
2008
- 2008-12-12 JP JP2008317034A patent/JP2010139851A/ja not_active Withdrawn
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2009
- 2009-12-08 EP EP09831689A patent/EP2357635A4/en not_active Withdrawn
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- 2009-12-08 CN CN2009801566837A patent/CN102317997A/zh active Pending
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JP2003005227A (ja) | 2001-06-20 | 2003-01-08 | Fuji Xerox Co Ltd | 画像表示装置及び表示駆動方法 |
JP2007507727A (ja) * | 2003-09-29 | 2007-03-29 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | 適切な階調及び自然な画像更新を伴う双安定ディスプレイ |
JP2007507738A (ja) * | 2003-10-03 | 2007-03-29 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | 電気泳動ディスプレイユニット |
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JP2008224890A (ja) * | 2007-03-09 | 2008-09-25 | Mitsubishi Pencil Co Ltd | 電気泳動表示装置、制御装置、制御方法、および表示システム |
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EP2357635A1 (en) | 2011-08-17 |
US20110242081A1 (en) | 2011-10-06 |
EP2357635A4 (en) | 2012-04-25 |
JP2010139851A (ja) | 2010-06-24 |
BRPI0923319A2 (pt) | 2019-09-24 |
CN102317997A (zh) | 2012-01-11 |
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