WO2009113626A1 - 情報表示用パネル - Google Patents
情報表示用パネル Download PDFInfo
- Publication number
- WO2009113626A1 WO2009113626A1 PCT/JP2009/054790 JP2009054790W WO2009113626A1 WO 2009113626 A1 WO2009113626 A1 WO 2009113626A1 JP 2009054790 W JP2009054790 W JP 2009054790W WO 2009113626 A1 WO2009113626 A1 WO 2009113626A1
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- WO
- WIPO (PCT)
- Prior art keywords
- information display
- electrode wiring
- substrate
- electrode
- conductive particles
- Prior art date
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Classifications
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/37—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being movable elements
- G09F9/372—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being movable elements the positions of the elements being controlled by the application of an electric field
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/165—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on translational movement of particles in a fluid under the influence of an applied field
- G02F1/166—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on translational movement of particles in a fluid under the influence of an applied field characterised by the electro-optical or magneto-optical effect
- G02F1/167—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on translational movement of particles in a fluid under the influence of an applied field characterised by the electro-optical or magneto-optical effect by electrophoresis
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/165—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on translational movement of particles in a fluid under the influence of an applied field
- G02F1/1675—Constructional details
- G02F1/1679—Gaskets; Spacers; Sealing of cells; Filling or closing of cells
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1339—Gaskets; Spacers; Sealing of cells
Definitions
- the present invention encloses a display medium composed of electrically drivable particles between two substrates, at least one of which is transparent, and a counter electrode formed by opposingly arranging pixel electrodes provided on each substrate.
- the present invention relates to an information display panel that displays information such as images by applying a voltage to the display medium and driving a display medium.
- a display medium composed of electrically drivable particles is sealed between a transparent front substrate and a rear substrate, and a voltage is applied between opposing counter electrodes provided on each substrate to electrically
- An information display panel that displays information such as an image by driving the image display device is known (for example, pamphlet of International Publication No. WO2005 / 062112).
- FIG. 8A to 8D are views showing an example of a conventional method for manufacturing an information display panel.
- electrodes B1 to B4 for supplying power to the pixel unit forming each information display unit and electrodes A1 to A4 for connecting to connection terminals of external circuits are provided.
- an anisotropic conductive sealant 53 made of an adhesive sealant containing conductive particles is disposed and provided outside the information display portion on the back substrate 51.
- the front substrate 52 is superposed on the back substrate 51 via the sealant 53, and the electrodes F1 to F4 of the front substrate 52 are connected to the electrodes A1 to A4 of the back substrate 51. It is taken out electrically.
- the anisotropically conductive sealing agent 53 the electrodes A1 to A4 marked with ⁇ and the electrodes F1 to F4 of the front substrate 52 come into contact with the conductive particles in the sealing agent 53, and only at that location. Conducted.
- Reference numeral 54 denotes an information display unit.
- the gap between the front substrate 52 and the rear substrate 51 is wider than that of a generally known liquid crystal display panel. It was necessary to use large particles as the particles. Moreover, in order to seal the information display part 54, it was necessary to provide the sealing agent 53 containing electroconductive particle so that the outer periphery of the information display part 54 might be enclosed.
- the X portion in the portion other than the portion marked with ⁇ in FIG. 8D (portion for electrically connecting the electrodes on each substrate), for example, the X portion, as shown in an enlarged view in FIG.
- the space between the adjacent electrodes in the conductive wirings 62 at positions corresponding to the arrangement portions of the sealant 53 is conductive particles.
- An object of the present invention is to solve the above-mentioned problems, and in a display medium drive type information display panel composed of particles, an electrode on the front substrate and a electrode on the rear substrate using a sealing agent containing conductive particles. It is an object of the present invention to provide an information display panel in which leakage does not occur between conductive wirings even when electrical continuity with electrodes and sealing of an information display portion are performed.
- An information display panel includes an information display section that displays information such as an image by applying a voltage between pixel electrodes provided on each substrate and driving a display medium.
- the electrode wiring concentration portion where the electrode wiring drawn from the pixel electrodes on both substrates gathers for connection with an external drive circuit and a connection terminal portion used for connection outside the information display portion, and An electrode wiring connected to a pixel electrode provided on one substrate using a sealant containing conductive particles, and an electrode wiring provided on the other substrate. Is electrically connected at a position outside the information display portion, and the width of the frame rib of the portion corresponding to the electrode wiring concentrated portion is formed wider than the other portions to correspond to the electrode wiring concentrated portion.
- Conductive in other parts In which characterized in that a sealant containing particles.
- An information display panel includes an information display section that displays information such as an image by applying a voltage between pixel electrodes provided on each substrate and driving a display medium.
- the electrode wiring concentration portion where the electrode wiring drawn from the pixel electrodes on both substrates gathers for connection with an external drive circuit and a connection terminal portion used for connection outside the information display portion, and An electrode wiring connected to a pixel electrode provided on one substrate using a sealant containing conductive particles, and an electrode wiring provided on the other substrate.
- An information display panel includes an information display unit that displays information such as an image by applying a voltage between pixel electrodes provided on each substrate and driving a display medium.
- the electrode wiring concentration portion where the electrode wiring drawn from the pixel electrodes on both substrates gathers for connection with an external drive circuit and a connection terminal portion used for connection outside the information display portion, and An electrode wiring connected to a pixel electrode provided on one substrate using a sealant containing conductive particles, and an electrode wiring provided on the other substrate. Is electrically connected at a position outside the information display portion, and the width of the frame rib of the portion corresponding to the electrode wiring concentrated portion is formed wider than the other portions to correspond to the electrode wiring concentrated portion.
- a space between panel substrates formed between the sealing agent containing conductive particles and the frame rib formed at the end of the panel is sealed with a sealing agent.
- the electrode wiring connected to the pixel electrode provided on one substrate and the electrode wiring provided on the other substrate using a sealing agent containing conductive particles are arranged at positions outside the information display unit.
- the width of the frame rib at the portion corresponding to the electrode wiring concentration portion is formed wider than the other portions, and (2) the substrate at the portion corresponding to the electrode wiring concentration portion.
- (A), (b) is a figure which shows the structure of an example of the information display panel of this invention, respectively. It is a figure which shows the structure of the other example of the information display panel of this invention.
- (A)-(d) is a figure which shows the structure of the further another example of the information display panel of this invention, respectively.
- (A), (b) is a figure for demonstrating an example of the information display panel which concerns on 1st invention of this invention, respectively.
- (A), (b) is a figure for demonstrating an example of the information display panel which concerns on 2nd invention of this invention, respectively.
- (A), (b) is a figure for demonstrating an example of the information display panel which concerns on 3rd invention of this invention, respectively.
- (A)-(d) is a figure which shows an example of the manufacturing method of the conventional information display panel, respectively. It is a figure for demonstrating the problem of the conventional information display panel.
- a basic configuration of a charged particle electric field driving system information display panel which is an example of the information display panel of the present invention will be described.
- an electric field is applied from a counter counter electrode to a display medium configured as a particle group including charged particles sealed between two opposing substrates.
- the display medium is attracted by an electric field force or a Coulomb force, and the moving direction of the display medium is switched 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 displayed 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 electrode 5 provided on the substrate 1 is shown (a white display medium 3W configured as a particle group including the chargeable white particles 3Wa and a black display medium 3B configured as a particle group including the chargeable black particles 3Ba).
- the electrode 6 provided on the substrate 2 are moved perpendicularly to the substrates 1 and 2 according to the electric field generated by applying a voltage, and the black display medium 3B is visually recognized by the observer.
- the white display medium 3W is visually recognized by the observer and white display is performed.
- a partition 4 is provided in a lattice shape between the substrates 1 and 2 to form cells.
- the partition in front is omitted.
- one type of display medium configured as a particle group including particles having at least optical reflectance and chargeability (in this case, a white display configured as a particle group including chargeable white particles 3Wa).
- the medium 3W is moved in a direction substantially perpendicular to the substrates 1 and 2 in accordance with the electric field generated by applying a voltage between the electrode 5 provided on the substrate 1 and the electrode 6 provided on the substrate 2.
- the white display medium 3W is visually recognized by the observer, or white display is performed, or the color of the color plate 7 (black here) provided under the transparent electrode 6 on the substrate 1 is visually recognized by the observer. Black display.
- a grid-like partition wall 4 is provided between the substrates 1 and 2 to form a cell.
- the partition in front is abbreviate
- FIGS. 3A to 3D are diagrams showing still other examples of the information display panel of the charged particle electric field driving method.
- the electrodes 5 and 6 of the charged particle electric field drive type information display panel are individual electrodes.
- the electrodes 5 and 6 of the charged particle electric field driving type information display panel are line electrodes.
- the electrodes 5 and 6 are individual electrodes, and a display medium composed of electrically drivable particles is filled in the capsule 8 and disposed between the substrates 1 and 2. Indicates.
- FIG. 3A the electrodes 5 and 6 of the charged particle electric field drive type information display panel are individual electrodes.
- the electrodes 5 and 6 of the charged particle electric field driving type information display panel are line electrodes.
- the electrodes 5 and 6 are individual electrodes, and a display medium composed of electrically drivable particles is filled in the capsule 8 and disposed between the substrates 1 and 2. Indicates.
- FIG. 3A the electrodes 5 and 6 of the charged particle electric field drive type information display panel are individual electrodes.
- the electrodes 5 and 6 are individual electrodes, and a microcapsule in which a rotating ball type display medium 9 having a different charging polarity by half and separately painted in black and white is sanitized with an insulating liquid is used as a substrate.
- a rotating ball type display medium 9 having a different charging polarity by half and separately painted in black and white is sanitized with an insulating liquid is used as a substrate.
- An example of arrangement between 1 and 2 is shown.
- the present invention can be preferably applied to any of the examples shown in FIGS. 3 (a) to 3 (d).
- FIGS. 4A, 4B to 6A, 6B are diagrams for explaining the configuration of an example of the information display panel of the present invention.
- 4 (a), 4 (b) to 6 (a), 6 (b) the conductive particles are used to connect the electrodes on the front substrate and the electrodes on the rear substrate, and the conductivity
- the point that the sealant containing particles is arranged between two substrates is the same as the example shown in FIGS. 8A to 8D described as the conventional example.
- 21 is an information display panel
- 22 is an information display section in which a display medium for driving display is arranged
- 23 is a frame rib provided on the outermost periphery of the information display unit 22
- 24 is a sealant containing conductive particles
- 25 is a lead-out electrode wiring from a pixel electrode provided on one substrate
- 26 is a conductive particle.
- the electrode wiring concentration part where all the extracted electrode wirings 26 and 27 are gathered the space between the electrode wirings becomes narrower than the particle diameter of the conductive particles in the sealant because it is connected to the electrode connection part 29 ahead.
- the part that contains the part It should be noted that the extraction electrode wiring 25 from the pixel electrode on one substrate is drawn out to the electrode wiring 26 on the other substrate through the sealing agent 24 containing conductive particles at the location of the circle.
- FIGS. 4A and 4B are views for explaining an example of the information display panel according to the first invention of the present invention.
- the electrode wiring 26 provided on the other substrate are electrically connected at a position outside the information display section 22 and the width of the frame rib 23 a corresponding to the electrode wiring concentration section 30.
- a sealing agent 24 containing conductive particles is disposed in a portion other than the portion corresponding to the electrode wiring concentration portion 30.
- the sealing agent 24 containing conductive particles is not provided, and the width of the frame rib 23 a corresponding to the electrode wiring concentration part 30 is set to be different from that of the other frame ribs 23. It is wider than the width.
- the sealing agent 24 is not disposed in the electrode wiring concentration portion 30, there is no conductive particle, and no leakage occurs between adjacent electrode wirings.
- the portion where the sealant 24 is not provided can be sealed by the frame rib 23 a having a wider frame rib 23.
- the sealing agent 32 is disposed in the gap 31 between the sealing agent 24 containing the conductive particles and the frame rib 23, thereby providing a seal.
- a gap 31 between the agent 24 and the frame rib 23 is sealed.
- higher sealing performance can be obtained as compared with the example shown in FIG.
- FIGS. 5A and 5B are views for explaining an example of the information display panel according to the second invention of the present invention.
- the electrode wiring 26 provided on the other substrate are electrically connected to each other at a position outside the information display unit 22 and at the end 41 of the substrate at a portion corresponding to the electrode wiring concentration portion 30.
- the sealing agent 24 containing conductive particles is disposed in a portion other than the portion corresponding to the electrode wiring concentration portion 30.
- the sealing agent 24 containing conductive particles is not provided, and the opening of the end portion 41 of the substrate is closed with the moisture-proof agent 42.
- the sealing agent 24 since the sealing agent 24 is not disposed in the electrode wiring concentration portion 30, there is no conductive particle, and no leakage occurs between adjacent electrodes.
- the portion where the sealing agent 24 is not provided can be sealed by disposing a moisture-proofing agent 42 from outside to block the entire opening of the end portion 41 of the substrate.
- the sealant 44 is applied to the gap 43 between the sealant 24 containing the conductive particles and the moisture-proofing agent 42, thereby providing a seal.
- a gap 43 between the agent 24 and the moisture-proof agent 42 is sealed.
- higher sealing performance can be obtained as compared with the example shown in FIG.
- FIGS. 6A and 6B are views for explaining an example of the information display panel according to the third aspect of the present invention.
- An electrode wiring concentration part 30 where electrode wirings 25 and 26 drawn out from the pixel electrodes on both substrates gather for connection to a connection terminal part 29 used for connection to an external drive circuit outside the information display part 22.
- the opening of the end portion 41 of the substrate in the portion corresponding to the electrode wiring concentration portion 30 is closed with the moisture-proof agent 42, and the sealing agent 24 containing conductive particles is disposed in the portion other than the portion corresponding to the electrode wiring concentration portion 30. is doing.
- the sealing agent 24 containing conductive particles is not provided, and the width of the frame rib 23 a corresponding to the electrode wiring concentration portion 30 is set to another frame rib 23.
- the opening of the end portion 41 of the substrate is closed with a moisture-proof agent 42.
- the sealing agent 24 since the sealing agent 24 is not disposed in the electrode wiring concentration portion 30, there is no conductive particle, and no leakage occurs between adjacent electrodes.
- the portion where the sealant 24 is not provided is sealed by the frame rib 23a having the widened frame rib 23, and the entire opening of the end portion 41 of the substrate is covered with a moisture-proof agent 42 from outside. It can be carried out.
- the sealing agent 32 is disposed in the gap 31 between the sealing agent 24 containing conductive particles and the frame rib 23, and the conductive property is increased.
- the sealant 44 is disposed in the gap 43 between the sealant 24 containing particles and the moistureproof agent 42, the gap between the sealant 24, the frame rib 23, and the moistureproof agent 42 is sealed.
- any of the conventionally known sealing agents 24, sealing agents 32 and 44, and moisture-proofing agents 42 containing conductive particles is used. Materials can also be used favorably.
- the particle size of the conductive particles used for the sealant is preferably matched to the gap between the substrates of the information display panel, and preferably has a particle size in the range of 10 to 50 ⁇ m and the same particle size.
- a sealant containing conductive particles having a particle size suitable for the gap between panel substrates is used.
- the gap between the opposing counter electrodes is designed in relation to the average particle diameter of the display medium particle group enclosed between the counter electrodes, and in the display medium particle group having an average particle diameter of 1 to 20 ⁇ m. , 20 to 100 ⁇ m, preferably 30 to 50 ⁇ m, to form a gap between the opposing counter electrodes.
- the conductive particles contained in the sealant are particles that are at least coated with a metal having excellent conductivity or composed of a single metal having excellent conductivity.
- the conductive particles may have dispersed cavities, may be hollow, or may not have cavities.
- the particle diameter of the conductive particles is preferably in the range of 1.0 to 1.2 times the gap between the counter electrodes.
- the content of the conductive particles is 1 to 30, preferably 5 to 10, with respect to 100 weight of the sealing agent.
- the conductive material constituting at least the surface layer of the conductive particles include metals such as silver, gold, copper, nickel, aluminum, chromium, platinum, and iron, and alloys containing them as a main component (for example, neodymium-chromium Nd-Cr). Etc.) are preferably used.
- At least one observation side substrate is the transparent substrate 2 from which the color of the display medium can be confirmed from the outside of the information display panel, and a material having high visible light transmittance and good heat resistance is suitable.
- the substrate 1 may be transparent or opaque.
- substrate materials include polymer materials such as polyethylene terephthalate, polyethylene naphthalate, polyethersulfone, polyethylene, polycarbonate, polyimide, and acrylic, flexible materials such as metals, glass, quartz, and hard plastics. There are things that are not flexible.
- the thickness of the substrate is preferably 2 to 5000 ⁇ m, and more preferably 5 to 2000 ⁇ m. If it is too thin, it will be difficult to maintain the strength and uniformity of the distance between the substrates. Is inconvenient.
- Electrode forming materials include metals such as aluminum, silver, nickel, copper, and gold, indium tin oxide (ITO), zinc-doped indium oxide (IZO), aluminum-doped zinc oxide (AZO), indium oxide, and conductive tin oxide.
- ITO indium tin oxide
- IZO zinc-doped indium 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 forming the above-described materials into a thin film by sputtering, vacuum deposition, CVD (chemical vapor deposition), coating, or the like, or metal foil (for example, rolled copper foil) And a method in which a conductive agent is mixed with a solvent or a synthetic resin binder and applied.
- the electrode provided on the display surface side substrate 2 which is on the viewing side and needs to be transparent needs to be transparent, but the electrode provided on the back side substrate 1 does not need to be transparent.
- the above-mentioned material that can be patterned and is electrically conductive can be suitably used.
- the electrode thickness may be 0.01 to 10 ⁇ m, preferably 0.05 to 10 ⁇ m, as long as electrical conductivity can be ensured and light transmittance is not hindered.
- the material and thickness of the electrode provided on the back side substrate 1 are the same as those of the electrode provided on the display surface side substrate described above, but need not be transparent. In this case, the external voltage input may be superimposed with a direct current or an alternating current.
- the shape of the partition wall 4 is optimally set as appropriate 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 partition wall width is 2 to 100 ⁇ m, preferably 3 to 50 ⁇ m. In addition, the height of the partition wall is adjusted to 10 to 100 ⁇ m, preferably 10 to 50 ⁇ m. In addition, the partition wall part that secures the gap between the substrates is matched with the gap between the substrates. In forming the partition wall, 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. In the present invention, any method is preferably used.
- 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 as viewed from the substrate plane direction. And a mesh shape. It is better to make the portion corresponding to the cross section of the partition wall visible from the display surface side (the area of the cell frame) as small as possible, and the display becomes clearer.
- 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 the information display panel of the present invention, and among these, a photolithography method using a resist film and a mold transfer method are suitably used.
- an information display panel having a configuration in which a display medium configured as a particle group including conductive particles was sealed between two glass substrates on which an electrode pattern was formed was produced.
- Example 1-4 since the information display panel is configured such that the sealant containing conductive particles is not disposed in the portion where the conductive wiring is disposed, leakage between adjacent conductive wirings is generated. And an information display panel capable of good display was obtained.
- the information display panel of the present invention is a notebook computer, an electronic notebook, a portable information device called PDA (Personal Digital Assistants), a display unit of a mobile device such as a mobile phone or a handy terminal, an electronic paper such as an electronic book or an electronic newspaper.
- PDA Personal Digital Assistants
- a display unit of a mobile device such as a mobile phone or a handy terminal
- an electronic paper such as an electronic book or an electronic newspaper.
- Billboards such as signboards, posters, blackboards (whiteboards), electronic desk calculators
- a particle group including conductive particles, a particle group including semiconductor particles, and the like can be electrically driven via an electrode.
- Various types of display media can be used.
- the driving method of the information display panel that is the object of the manufacturing method of the present invention a simple matrix driving method and a static driving method that do not use a switching element in the panel itself, and a three-terminal switching element represented by a thin film transistor (TFT)
- TFT thin film transistor
- the present invention can be applied to an active matrix driving method using a two-terminal switching element typified by a thin film diode (TFD) and various types of driving information display panels.
- TFT thin film transistor
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Abstract
Description
図4(a)、(b)はそれぞれ本発明の第1発明に係る情報表示用パネルの一例を説明するための図である。図4(a)に示す例では、情報表示部22の外側に、外部駆動回路との接続に用いる接続端子部29との接続のために、双方の基板上の画素電極から引き出された電極配線25、26が集まる電極配線集中部30と、情報表示部22の外側に設けられた枠リブ23と、を備え、導電性粒子を含むシール剤24を用いて、一方の基板に設けた画素電極に繋がる電極配線25と、他方の基板に設けた電極配線26とを、情報表示部22の外側の位置で電気的に接続するとともに、電極配線集中部30に対応する部分の枠リブ23aの幅を、それ以外の部分よりも広く形成し、電極配線集中部30に対応する部分以外の部分に、導電性粒子を含むシール剤24を配置している。言い換えると、情報表示部22の外側領域にある電極配線集中部30において、導電粒子を含むシール剤24を設けず、電極配線集中部30に対応する枠リブ23aの幅を他の枠リブ23の幅より広げている。本例では、電極配線集中部30の部分にシール剤24を配置しないので、導電性粒子が無く、隣り合う電極配線間のリークは発生しない。一方、シール剤24を設けていない部分のシールは、枠リブ23の幅を広げた枠リブ23aにより行うことができる。
図5(a)、(b)はそれぞれ本発明の第2発明に係る情報表示用パネルの一例を説明するための図である。図5(a)に示す例では、情報表示部22の外側に、外部駆動回路との接続に用いる接続端子部29との接続のために、双方の基板上の画素電極から引き出された電極配線25、26が集まる電極配線集中部30と、情報表示部22の外側に設けられた枠リブ23と、を備え、導電性粒子を含むシール剤24を用いて、一方の基板に設けた画素電極に繋がる電極配線25と、他方の基板に設けた電極配線26とを、情報表示部22の外側の位置で電気的に接続するとともに、電極配線集中部30に対応する部分における基板の端部41の開口を防湿剤42で塞ぎ、電極配線集中部30に対応する部分以外の部分に、導電性粒子を含むシール剤24を配置している。言い換えると、情報表示部22の外側領域にある電極配線集中部30の部分において、導電粒子を含むシール剤24を設けず、基板の端部41の開口を防湿剤42で塞いでいる。本例では、電極配線集中部30の部分にシール剤24を配置しないので、導電性粒子が無く、隣り合う電極間のリークは発生しない。一方、シール剤24を設けていない部分のシールは、基板の端部41の開口全体に外部から防湿剤42を配置して塞ぐことで行うことができる。
図6(a)、(b)はそれぞれ本発明の第3発明に係る情報表示用パネルの一例を説明するための図である。図6(a)に示す例では、
情報表示部22の外側に、外部駆動回路との接続に用いる接続端子部29との接続のために、双方の基板上の画素電極から引き出された電極配線25、26が集まる電極配線集中部30と、情報表示部22の外側に設けられた枠リブ23と、を備え、導電性粒子を含むシール剤24を用いて、一方の基板に設けた画素電極に繋がる電極配線25と、他方の基板に設けた電極配線26とを、情報表示部22の外側の位置で電気的に接続するとともに、電極配線集中部30に対応する部分の枠リブ23aの幅を、それ以外の部分よりも広く形成し、電極配線集中部30に対応する部分における基板の端部41の開口を防湿剤42で塞ぎ、電極配線集中部30に対応する部分以外の部分に、導電性粒子を含むシール剤24を配置している。言い換えると情報表示部22の外側領域にある電極配線集中部30の部分において、導電粒子を含むシール剤24を設けず、電極配線集中部30に対応する枠リブ23aの幅を他の枠リブ23の幅より広げるとともに、基板の端部41の開口を防湿剤42で塞いでいる。本例では、電極配線集中部30の部分にシール剤24を配置しないので、導電性粒子が無く、隣り合う電極間のリークは発生しない。一方、シール剤24を設けていない部分のシールは、枠リブ23の幅を広げた枠リブ23aにより行うとともに、基板の端部41の開口全体に外部から防湿剤42を塗布して塞ぐことで行うことができる。
本発明でシール剤に含まれる導電性粒子は、少なくとも粒子表面が導電性に優れた金属で完全にコーティングされるか導電性に優れた金属単体で構成された粒子である。導電性粒子の内部には分散した空洞があってもよいし、中空であってもよいし、空洞がなくてもよい。導電性粒子の粒子径は対向電極間ギャップよりも1.0~1.2倍の範囲にあることが好ましい。1.2倍を超えると電極が形成された2枚の基板を押し広げようとする力が大きくなり貼り合わせたパネル基板が剥がれる不都合を引き起こすおそれがあり、1.0倍未満であると電極間での導通がとれない不都合を引き起こすおそれがある。
導電性粒子の含有量は、シール剤の重量100に対して、1~30、好ましくは5~10である。少なくとも導電性粒子の表面層を構成する導電材料としては、銀、金、銅、ニッケル、アルミニウム、クロム、白金、鉄等の金属やそれらを主成分とする合金(例えば、ネオジウム-クロムNd-Crなど)が好適に用いられる。
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、いずれの方法も好適に用いられる。
これらのリブからなる隔壁により形成されるセルは、図7に示すごとく、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。
アクリル粒子表面に金メッキした直径43μmの導電性粒子をシール剤に分散(重量比で、シール剤:粒子=10:1)して、対向電極間ギャップ40μmの情報表示用パネルの異方導電性シール剤とした。
アクリル粒子表面に金メッキした直径33μmの導電性粒子をシール剤に分散(重量比で、シール剤:粒子=10:1)して、対向電極間ギャップ30μmの情報表示用パネルの異方導電性シール剤とした。
アクリル粒子表面に金メッキした直径40μmの導電性粒子をシール剤に分散(重量比で、シール剤:粒子=10:1)して、対向電極間ギャップ40μmの情報表示用パネルの異方導電性シール剤とした。
アクリル粒子表面に金メッキした直径48μmの導電性粒子をシール剤に分散(重量比で、シール剤:粒子=10:1)して、対向電極間ギャップ40μmの情報表示用パネルの異方導電性シール剤とした。
Claims (6)
- 各基板に設けた画素電極間に電圧を印加し、表示媒体を駆動させて画像等の情報を表示する情報表示部を有する情報表示用パネルにおいて、前記情報表示部の外側に、外部駆動回路との接続に用いる接続端子部との接続のために、双方の基板上の前記画素電極から引き出された電極配線が集まる電極配線集中部と、前記情報表示部の外側に設けられた枠リブと、を備え、導電性粒子を含むシール剤を用いて、一方の基板に設けた画素電極に繋がる電極配線と、他方の基板に設けた電極配線とを、前記情報表示部の外側の位置で電気的に接続するとともに、前記電極配線集中部に対応する部分の枠リブの幅を、それ以外の部分よりも広く形成し、電極配線集中部に対応する部分以外の部分に、導電性粒子を含むシール剤を配置したことを特徴とする情報表示用パネル。
- パネル端部に形成された、導電性粒子を含むシール剤と枠リブとで挟まれたパネル基板間空間を封止剤にて封止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。
- 各基板に設けた画素電極間に電圧を印加し、表示媒体を駆動させて画像等の情報を表示する情報表示部を有する情報表示用パネルにおいて、前記情報表示部の外側に、外部駆動回路との接続に用いる接続端子部との接続のために、双方の基板上の前記画素電極から引き出された電極配線が集まる電極配線集中部と、前記情報表示部の外側に設けられた枠リブと、を備え、導電性粒子を含むシール剤を用いて、一方の基板に設けた画素電極に繋がる電極配線と、他方の基板に設けた電極配線とを、前記情報表示部の外側の位置で電気的に接続するとともに、前記電極配線集中部に対応する部分における基板の端部の開口を防湿剤で塞ぎ、電極配線集中部に対応する部分以外の部分に、導電性粒子を含むシール剤を配置したことを特徴とする情報表示用パネル。
- パネル端部に形成された、導電性粒子を含むシール剤と防湿剤とで挟まれたパネル基板間空間を封止剤にて封止することを特徴とする請求項3に記載の情報表示用パネル。
- 各基板に設けた画素電極間に電圧を印加し、表示媒体を駆動させて画像等の情報を表示する情報表示部を有する情報表示用パネルにおいて、前記情報表示部の外側に、外部駆動回路との接続に用いる接続端子部との接続のために、双方の基板上の前記画素電極から引き出された電極配線が集まる電極配線集中部と、前記情報表示部の外側に設けられた枠リブと、を備え、導電性粒子を含むシール剤を用いて、一方の基板に設けた画素電極に繋がる電極配線と、他方の基板に設けた電極配線とを、前記情報表示部の外側の位置で電気的に接続するとともに、前記電極配線集中部に対応する部分の枠リブの幅を、それ以外の部分よりも広く形成し、電極配線集中部に対応する部分における基板の端部の開口を防湿剤で塞ぎ、電極配線集中部に対応する部分以外の部分に、導電性粒子を含むシール剤を配置したことを特徴とする情報表示用パネル。
- パネル端部に形成された、導電性粒子を含むシール剤と枠リブとで挟まれたパネル基板間空間および導電性粒子を含むシール剤と防湿剤とで挟まれたパネル基板間空間を、封止剤にて封止することを特徴とする請求項5に記載の情報表示用パネル。
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WO2005062112A1 (ja) | 2003-12-19 | 2005-07-07 | Bridgestone Corporation | 情報表示装置の製造方法 |
JP2008009423A (ja) * | 2006-05-31 | 2008-01-17 | Bridgestone Corp | 情報表示用パネル |
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JP2005181514A (ja) * | 2003-12-17 | 2005-07-07 | Seiko Epson Corp | 液晶装置、液晶装置の製造方法、電子機器 |
WO2005062112A1 (ja) | 2003-12-19 | 2005-07-07 | Bridgestone Corporation | 情報表示装置の製造方法 |
JP2008009423A (ja) * | 2006-05-31 | 2008-01-17 | Bridgestone Corp | 情報表示用パネル |
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