JP2009122375A - Writable information display panel, and its usage - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a writable information display panel capable of attaining excellent contrast in two-color display images in the two-color writable information display panel using a pen type writing unit. <P>SOLUTION: The writable information display panel combines four kinds of the three-color display media composed to contain electrification particles so that colors are mutually different by each two-kinds, being sealed in a cell space formed of a partition wall between substrates, and rewrites display information by giving an electric field to the display media. The writable information display panel arranges a background color display medium (positive electrification)/a first display color display medium (negative electrification) in one cell as combination of the four kinds of the three-color display media, arranges a background color display medium (negative electrification)/a second color display medium (positive electrification) in an adjacent cell, performs information display of a first display color by moving the pen type writing unit of the positive electrification on the observation side substrate of the panel, and performs information display of a second display color by moving the pen type writing unit of the negative electrification on the observation side substrate of the panel. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  In the present invention, three colors and four kinds of display media each including a charged particle are combined in two different colors so as to be sealed in a cell space formed between the substrates and formed by the partition walls. The present invention relates to a writable information display panel that can rewrite display information by applying an electric field to a display medium, and a method of using the same.

  2. Description of the Related Art Conventionally, there is known an information display panel that displays information by displaying a trajectory of a pen type writing device on the panel by moving the pen type writing device on the panel using a pen type listening device. In addition, as an information display panel capable of displaying two colors, a display medium of three colors is arranged in one cell, and the charging polarity is made the same for the display medium of two colors, and the difference in adhesion to the substrate is the There is known a technique for controlling the driving of another display medium having a different charge polarity by giving a difference in drivability (see, for example, Patent Document 1).

JP 2007-140110 A

  In the conventional information display panel described above, in an example in which a black and white two-color display medium is used, there is a problem that only writing information can be displayed in black on a white background (or vice versa). Further, in the example using the three-color display medium, the two-color display medium (charged particles) are made to have the same charge polarity, and the difference in the drive state due to the difference in the adhesion state to the substrate, Since the drive of the display medium was to be controlled, there was a problem that a defect occurred in the contrast of the display image.

  An object of the present invention is an information display panel capable of solving the above-described problems and capable of displaying two colors using a pen-type writer, and after displaying the first color, displaying the second color It is an object of the present invention to provide a writable information display panel capable of achieving excellent contrast in a two-color display image and a method of using the same.

  The writable information display panel according to the present invention is formed by partition walls between substrates by combining three colors and four kinds of display media each including charged particles so that two kinds of colors are different from each other. A writable information display panel in which display information can be rewritten by sealing in a cell space and applying an electric field to the display medium, and a background color display medium (plus (Charge) / first display color display medium (minus charge) is placed in one cell, background color display medium (minus charge) / second color display medium (plus charge) is placed in an adjacent cell, and the panel is observed The first display color information is displayed by moving the positively charged pen type writing device on the side substrate, and the second display color is displayed by moving the negatively charged pen type writing device on the observation side substrate of the panel. It is characterized in that it has configured to perform information display.

  As a preferred example of the writable information display panel of the present invention, a transparent conductive member for applying a voltage when rewriting display information and erasing display information is applied to the observation side substrate in contact with the pen-type writing device. In the back side substrate, a conductive member for applying a voltage when rewriting display information and erasing display information is arranged as an electrode corresponding to each cell. A transparent conductive member for applying a voltage when rewriting display information and erasing display information is arranged as an electrode corresponding to each cell, and a conductive material for applying a voltage when rewriting display information and erasing display information is disposed on the back side substrate. A predetermined voltage is applied to the conductive member when the member is arranged as an electrode corresponding to each cell, when the display information is rewritten and when the display information is erased. Is equipped with a voltage applying means and the power of the eye, and display information such as an image by applying a predetermined voltage to the conductive member, the erasing information displayed, there is.

  As another example of the writable information display panel according to the present invention, the pen type writer is provided with a pen tip electrode, and a voltage is applied to the pen tip electrode voltage switching device and the pen tip electrode. A power supply (battery) is built in, and the voltage polarity applied to the pen tip electrode by the operation of the changeover switch can be switched between a positive voltage application state, a negative voltage application state, and a voltage application OFF state, The pen tip electrode of the pen-type writer has the same area as one display unit area of the information display panel, and the pen tip edge may be rounded.

  Further, according to the method of using the information display panel of the present invention, in the writable information display panel having the above-described configuration, one type of combination of two types of background color display medium / display color display medium is stored. After the display medium is moved by the electric field generated by applying a voltage to the counter electrode pair corresponding to the cell and displaying with one display color, the applied power is turned off, and then the pen type writing device Different potentials from the back-side electrodes corresponding to the cells in which another combination of the pen tip electrode and the two types of background color display medium / display color display medium not used for the previous display is stored. In this state, another color display is written by moving the panel on the observation substrate.

  According to the present invention, three colors and four types of display media including charged particles are combined in two different colors, and sealed in a cell space formed between the substrates and formed by the partition walls. A writable information display panel in which display information can be rewritten by applying an electric field to the display medium, and a background color display medium (plus charge) / first as a combination of three colors and four types of display media Place the display color display medium (minus charge) in one cell, place the background color display medium (minus charge) / second color display medium (plus charge) in the adjacent cells, and add it on the observation side substrate of the panel Information display of the first display color is performed by moving the charged pen type writing device, and information display of the second display color is performed by moving the negatively charged pen type writing device on the observation side substrate of the panel. Constitution Thus, an information display panel capable of displaying two colors using a pen-type writing device, and after displaying the first color, the second-color display is written and displayed using the pen-type writing device. It is possible to obtain a writable information display panel that can achieve excellent contrast in a two-color display image and a method of using the same.

  First, the basic configuration of the information display panel of the present invention will be described. In the information display panel of the present invention, an electric field is applied to a display medium configured as a particle group including a chargeable particle sealed between two opposing substrates. Along with the applied electric field direction, 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 stability when rewriting the display repeatedly or when displaying the display information continuously. Here, as 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.

  An example of the information display panel of the present invention will be described based on FIGS. 1 (a) and (b) to FIGS. 2 (a) and 2 (b).

  In the example shown in FIGS. 1A and 1B, the optical reflectivity and charging characteristics of each other, which are configured as a particle group composed of at least one kind of particles including particles having optical reflectivity and chargeability. At least two types of display media 3 having different colors (here, a white display medium 3W composed of particles of white display medium particles 3Wa and a black display medium 3B composed of particles of black display medium particles 3Ba are shown) between substrates. An electric field generated by applying a voltage between an electrode 5 (individual electrode) provided on the substrate 1 and an electrode 6 (individual electrode) provided on the substrate 2 in each cell 7 formed by encapsulating and partitioning 4. Accordingly, the substrate is moved perpendicularly to the substrates 1 and 2. Then, as shown in FIG. 1A, the white display medium 3W is visually recognized by the observer and white dot display is performed, or as shown in FIG. 1B, the black display medium 3B is visually recognized by the observer. Black dots are displayed. In addition, in FIG. 1 (a), (b), the partition in front is abbreviate | omitted.

  In the example shown in FIGS. 2A and 2B, the optical reflectance and charging characteristics of each other are configured as a particle group composed of at least one kind of particles including particles having optical reflectance and chargeability. Two or more different display media 3 are enclosed between substrates (here, a white display medium 3W composed of particles of white display medium particles 3Wa and a black display medium 3B composed of particles of black display medium particles 3Ba are shown). In each cell 7 formed by the partition walls 4, according to the electric field generated by applying a voltage between the electrode 5 (line electrode) provided on the substrate 1 and the electrode 6 (line electrode) provided on the substrate 2. The substrate 1 and 2 are moved vertically. Then, as shown in FIG. 2 (a), the white display medium 3W is visually recognized by the observer and white dot display is performed, or as shown in FIG. 2 (b), the black display medium 3B is visually recognized by the observer. Black dots are displayed. In addition, in FIG. 2 (a), (b), the partition in front is abbreviate | omitted.

  The writable information display panel according to the present invention is characterized in that three colors and four kinds of display media each including a chargeable particle are combined with each other in two different colors so that a partition is formed between the substrates. It is configured as a dot matrix display type information display panel that is sealed in a cell space (including a microcapsule space) and can rewrite display information by moving the display medium by applying an electric field to the display medium.

  The background color display medium (plus charge) / first display color display medium (minus charge) are arranged in one cell or microcapsule so that the three colors and four kinds of display media are combined in two different colors. The background color display medium (minus charge) / second display color display medium (plus charge) is placed in the adjacent cell or microcapsule. The background color display medium is preferably a light and light color such as white or yellow, and the display color display medium is preferably a light or dark color such as black, red, blue, green, brown or purple.

  A transparent conductive member for applying a voltage when rewriting display information and erasing display information is placed on the observation side substrate (the substrate on which the pen-type writer is brought into contact) of the information display panel, and when the display information is rewritten on the back side substrate In addition, a conductive member for applying a voltage when erasing display information is arranged as an electrode corresponding to each cell. The transparent conductive member can be a solid electrode film or an electrode (line electrode or individual electrode) corresponding to each cell. A conductive member is provided on the back side substrate as an electrode corresponding to each cell as a line electrode or an individual electrode.

  The information display panel is equipped with voltage applying means and a power source (battery) for applying a predetermined voltage to the panel substrate electrode (conductive member) when rewriting and erasing display information, and the display information is given by applying a predetermined voltage. Rewrite and delete display information.

  Information writing display is performed by a dedicated pen-type writing device. The pen tip of the writer is configured as an electrode so that the polarity of the voltage applied to the pen tip can be changed. Further, the pen tip electrode is made substantially equal to one display unit area of the information display panel. Further, it is preferable that the pen tip edge is rounded because the pen tip edge can be moved smoothly while being in contact with the panel substrate. The pen-type writing device has a built-in nib electrode voltage switching device and a power source (battery) for applying voltage to the nib electrode, and the voltage polarity applied to the nib electrode by operating the changeover switch is set to the plus voltage application state. The negative voltage application state and the voltage application OFF state can be switched and changed.

  Next, each component of the writable information display panel of the present invention will be described.

  A transparent conductive member is arranged on the observation side substrate (substrate on which the pen-type writing device is brought into contact) of the information display panel, and the conductive member is arranged as an electrode corresponding to each cell on the back side substrate. The transparent conductive member can be a solid electrode film or an electrode (line electrode or individual electrode) corresponding to each cell. A conductive member is provided on the back side substrate as an electrode corresponding to each cell as a line electrode or an individual electrode. The information display panel is equipped with a voltage applying means and a power source (battery) for applying a predetermined voltage to the panel substrate electrode (conductive member), and a predetermined voltage is applied to display and erase the information image.

  The display unit of the information display panel is configured by a dot matrix display method in which a display medium is sealed in a space between two substrates, one of which is transparent. It is preferable to provide a partition in the inter-substrate space to partition the space into a plurality of small rooms (cells) and to arrange the display medium in the cell. Thereby, it is possible to prevent the charged particles (display medium) enclosed from being biased. When charged particles (display medium) are sealed in a microcapsule, the microcapsule has a function of a cell (small room), and thus it is not necessary to provide a cell (small room).

  As the display medium, a display memory (bistable) such as a charged particle gas moving method (for example, an electronic powder fluid method) in which charged particles are driven in a gas space, or a charged particle electrophoresis method in which charged particles are driven in an insulating liquid. It can be applied to those having a characteristic.

  In image erasing when a solid electrode (solid conductive film) is provided on the observation side substrate, the polarity and magnitude of the applied voltage are controlled based on the relationship between the cell-corresponding electrode on the back side substrate and the charging polarity of the background color display medium. Delete the image. In image erasure when cell-compatible electrodes (line electrodes or individual electrodes) are provided on the observation-side substrate, the background color display medium is observed in all cells by controlling the polarity and magnitude of the voltage applied to each cell-compatible electrode. The image is erased by moving to the side substrate. The conductive member (electrode) provided on the observation side substrate is transparent, but the cell corresponding electrode provided on the back side substrate may not be transparent. The displayed information image can be partially erased by controlling the polarity and magnitude of the voltage applied to the cell-corresponding electrode on the back substrate and the pen tip electrode of the pen-type writing device.

  As the transparent conductive material used as the transparent conductive member, indium tin oxide (ITO), indium oxide, zinc-doped indium oxide (IZO), aluminum-doped zinc oxide (AZO), antimony tin oxide (ATO), conductive tin oxide, Examples thereof include transparent conductive metal oxides such as conductive zinc oxide, polyaniline, polypyrrole, and polythiophene. Examples of the conductive material that does not need to be transparent include copper, aluminum, silver, nickel, gold, chromium, and metals such as alloys (for example, Nd—Cr) containing these as a main component. It can arrange | position to the back side board | substrate including what was mentioned as.

  As a method for forming an 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 a method of laminating a metal foil (for example, rolled copper foil) A method of mixing a conductive agent with a solvent or a synthetic resin binder and applying the conductive agent is used. The above-mentioned material that can be patterned and is electrically conductive can be preferably used.

  The thickness of the conductive member or electrode formed of a transparent conductive material may be 0.01 to 10 μm, preferably 0.05 to 5 μm, as long as conductivity can be secured and light transmittance is not hindered. Moreover, the thickness of the electrode formed of a metal material may be 0.01 to 10 μm, preferably 0.05 to 5 μm, as long as conductivity can be secured.

  As substrates, inorganic sheets such as glass and quartz, polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polyethylene (PE), polycarbonate (PC), polyimide (PI), polyethersulfone (PES), acrylic An organic polymer-based substrate such as glass resin-reinforced resin substrate (for example, a glass / epoxy substrate) is used, but a transparent substrate is used as the observation side display surface.

  3 to 8 are diagrams for explaining specific panel configuration examples in the writable information display panel of the present invention.

  In the example shown in FIGS. 3 and 4, a transparent conductive member is provided as a solid electrode as the observation-side electrode 6, and two adjacent (FIG. 3) and four (FIG. 4) cells 7 are each displayed in one display unit (1 A configuration in which information is displayed in black or red on a white background is shown. In the example shown in FIG. 3, a cell 7 enclosing a white display medium (minus charge) 3W− / black display medium (plus charge) 3B + and a red display medium (minus charge) 3R− / white display medium (plus charge) 3W + This is an example in which the cells 7 enclosing the cells are arranged adjacent to each other, and the electrode 5 arranged corresponding to each cell 7 is a line electrode. In the example shown in FIG. 4, a cell 7 enclosing a white display medium (minus charge) 3W- / black display medium (plus charge) 3B + and a red display medium (minus charge) 3R- / white display medium (plus charge) 3W + This is an example in which the cells 7 enclosing the cells are arranged adjacent to each other, and the electrode 5 arranged corresponding to each cell 7 is an individual electrode.

  In the example shown in FIGS. 5 and 6, a transparent conductive member is provided as an electrode for each cell as the observation-side electrode 6, and two adjacent (FIG. 5) and four (FIG. 6) cells 7 are each in one display unit. A configuration is shown in which (1 dot) is set so that information can be displayed in black or red on a white background. In the example shown in FIG. 5, a cell 7 enclosing a white display medium (minus charge) 3W− / black display medium (plus charge) 3B + and a red display medium (minus charge) 3R− / white display medium (plus charge) 3W + In this example, the electrodes 7 and 6 disposed adjacent to the cells 7 are line electrodes. In the example shown in FIG. 6, a cell 7 enclosing a white display medium (minus charge) 3W- / black display medium (plus charge) 3B + and a red display medium (minus charge) 3R- / white display medium (plus charge) 3W + This is an example in which the cells 7 enclosing the cells are arranged adjacent to each other, and the electrodes 5 and 6 arranged corresponding to the cells 7 are individual electrodes.

  In the example shown in FIG. 3 to FIG. 6, as a display medium (in this case, a white display medium) as a background color, a positively charged one and a negatively charged one are enclosed in an adjacent cell. Be free. Moreover, although the example which made the inside of a cell the gas space was shown here, the inside of a cell can also be made into an insulating liquid space.

  In the example shown in FIG. 7, a transparent conductive member is provided as a solid electrode as the observation-side electrode 6, and four adjacent microcapsules 11 are set as one display unit (one dot) so that information can be displayed in black or red on a white background. The configuration shown in FIG. In the example shown in FIG. 8, the electrodes 5 and 6 are provided as individual electrodes corresponding to the microcapsules 11, and the adjacent four microcapsules are set as one display plate (1 dot), and information can be displayed in black or red on a white background. The configuration as described above is shown. In the example shown in FIG. 7, a microcapsule 11 in which a white display medium (minus charge) 3W− / black display medium (plus charge) 3B + is enclosed with an insulating liquid 12, and a red display medium (minus charge) 3R− / white display medium. (Positive charging) An example in which the microcapsules 11 enclosing 3W + together with the insulating liquid 12 are arranged adjacent to each other, and the electrode 5 arranged corresponding to each cell 7 is a line electrode. In the example shown in FIG. 8, a cell 7 enclosing a white display medium (minus charge) 3W- / black display medium (plus charge) 3B + and a red display medium (minus charge) 3R- / white display medium (plus charge) 3W + This is an example in which the cells 7 enclosing the cells are arranged adjacent to each other, and the electrode 5 arranged corresponding to each cell 7 is an individual electrode.

  FIGS. 9A to 9D and FIGS. 10A to 10D are diagrams for explaining an example of the display operation in the information display panel of the present invention.

  FIGS. 9A to 9D are diagrams for explaining an example of the display operation when the transparent conductive member is a solid electrode (corresponding to the panel configuration of FIGS. 3 and 4). 9A shows an initial (screen erase) state, FIG. 9B shows a write start state: a state in which a plus voltage (+ V) is applied to a pen-type programmer, and FIG. State: shows a state in which the pen-type writing device is moved while touching the substrate. FIG. 9D shows a state in which writing is completed: a state in which the pen-type writing device is separated from the substrate.

  In the initial (screen erased) state shown in FIG. 9A, a plus low potential (+ VL) is applied to the electrode 6 made of a transparent conductive member (film) provided on the observation-side substrate 2, and the back-side substrate 2 is applied. As shown in the drawing, a minus low potential (−VL) and a plus high potential (+ VH) are respectively applied to the provided cell-corresponding electrodes 5. As a result, a white erase state is established. Next, in the write start state shown in FIG. 9B, a minus potential (−V) is applied to each cell corresponding electrode 5 provided on the substrate 1 on the back side. In this state, the display medium particles arranged at the portion where the pen-type writing device 21 to which + V is applied is in contact with the observation-side substrate 2 move in the electric field direction. Here, the negatively charged white display medium 3W− and the negatively charged red display medium 3R− move to the substrate 2 on the observation side. Next, in the middle of writing shown in FIG. 9C, the particles for the display medium arranged at the contact portion moved while the pen-type writing device 21 to which + V is applied are touched move in the direction of the electric field and are negatively charged. Display media 3W- and 3R- move to the substrate 2 on the observation side. Next, in the writing end state shown in FIG. 9D, the display medium particles arranged at the contact portion moved while touching the pen-type writing device 21 move in the direction of the electric field, and are then attached to the observation-side substrate 2. Observed in the attached state. Here, information is displayed in red on a white background. Even if the voltage application to the electrode is turned off in this state, the displayed information is displayed as it is (memory property).

  FIGS. 10A to 10D are diagrams for explaining an example of the display operation when the transparent conductive member is a cell corresponding electrode (line electrode or individual electrode) (corresponding to the panel configuration of FIGS. 5 and 6). FIG. FIG. 10A shows an initial (screen erase) state, FIG. 10B shows a writing start state: a state where a plus voltage (+ V) is applied to the pen-type writing device, and FIG. State: shows a state where the pen-type writing device is moved while touching the substrate, and FIG. 10D shows a state where writing is completed: the state where the pen-type writing device is separated from the substrate.

  In the initial (screen erase) state shown in FIG. 10A, a predetermined potential (+ V or −V) is applied to the electrode 6 made of a transparent conductive member (line electrode or individual electrode) provided on the substrate 2 on the observation side. A predetermined potential (−V or + V) is applied to each cell-corresponding electrode 5 provided on the substrate 2 on the back side. As a result, an erased state (white solid image display state) is established. Next, in the writing start state shown in FIG. 10B, a negative potential (−V) is applied to each cell-corresponding electrode 5 provided on the substrate 1 on the back side, and provided on the substrate 2 on the observation side. The electrode 6 is kept off. In this state, the display medium particles arranged at the portion where the pen-type writing device 21 to which + V is applied is in contact with the observation-side substrate 2 move in the electric field direction. Here, the negatively charged white display medium 3W− and the negatively charged red display medium 3R− move to the substrate 2 on the observation side. Next, in the middle of writing state shown in FIG. 10C, the particles for the display medium arranged at the contact portion moved while the pen-type writing device 21 to which + V is applied is touched move in the direction of the electric field, and negative power failure occurs. Display media 3W- and 3R- move to the substrate 2 on the observation side. Next, in the writing end state shown in FIG. 10D, the display medium particles arranged at the contact portion moved while touching the pen-type writing device 21 move in the direction of the electric field, and are then attached to the observation-side substrate 2. Observed in the attached state. Here, information is displayed in red on a white background. Even if the voltage application to the electrode is turned off in this state, the displayed information is displayed as it is (memory property). In FIGS. 10C and 10D, the electrode 6 is omitted.

  FIGS. 11A to 11D are diagrams for explaining an example of a state in which information is actually written on the information display panel of the present invention by a pen-type writing device. In the example shown in FIG. 11A, a state in which a plus potential is applied to the pen tip of the pen-type writing device 21 to write information on the information display panel 22 is shown. In the example shown in FIG. 11B, the pen tip of the pen-type writer 21 is moved while touching the information display panel 22 in the state shown in FIG. 11A, and the character information “A” is written and displayed in black. Indicates. In the example shown in FIG. 11C, a negative potential is applied to the pen tip of the pen-type writer 21, the pen tip is moved to the information display panel 22 while touching the information display panel 22, and the character information “A” is transferred. The state of red writing is shown. In the example shown in FIG. 11D, after the writing of the character information “A” shown in FIG. 11B is finished, a negative potential is applied to the pen tip of the pen-type writing device 21 to put the pen tip on the information display panel 22. The figure shows a state in which the user moves while touching the information display panel 22 and starts writing character information different from the character information “A”.

  FIGS. 12A to 12D are diagrams for explaining other examples of a state where information is actually written on the information display panel of the present invention by a pen-type writing device. In the example shown in FIG. 12 (a), a negative potential is applied to the pen tip of the pen-type writing device 21 on the information display panel 22 on which black character information is displayed by display rewriting, and red characters are written by handwriting. It shows how it is doing. In the example shown in FIG. 12B, the pen tip of the pen-type writing device 21 is moved while touching the information display panel 22 to start writing display of the red handwritten character information “A”. In the example shown in FIG. 12C, a negative potential is applied to the pen tip of the pen-type writing device 21 and moved while touching the pen tip to the information display panel 22 to finish writing the red handwritten character information “ABCDEFG”. And, it shows how the next writing is going to be done. In the example shown in FIG. 12D, a negative potential is applied to the pen tip of the pen-type writing device 21 and moved while touching the pen tip to the information display panel 22 to finish writing the red handwritten character information “ABCD”. Shows how it was done.

  The writable information display panel of the present invention is an electronic price tag, electronic shelf label, electronic instruction manual, electronic POP (Point of presnece, Point of Purchase) that can be continuously displayed until the written information is erased. advertising), electronic advertisements, electronic information display devices such as information boards, and electronic paper such as electronic memo pads and electronic notebooks.

(A), (b) is a figure for demonstrating an example of the writable information display panel of this invention, respectively. (A), (b) is a figure for demonstrating the other example of the writable information display panel of this invention, respectively. It is a figure for demonstrating an example of the concrete panel structure in the writable information display panel of this invention. It is a figure for demonstrating other examples of the concrete panel structure in the writable information display panel of this invention. It is a figure for demonstrating the further another example of the concrete panel structure in the writable information display panel of this invention. It is a figure for demonstrating the further another example of the concrete panel structure in the writable information display panel of this invention. It is a figure for demonstrating the further another example of the concrete panel structure in the writable information display panel of this invention. It is a figure for demonstrating the further another example of the concrete panel structure in the writable information display panel of this invention. (A)-(d) is a figure for demonstrating an example of the display operation in the information display panel of this invention, respectively. (A)-(d) is a figure for demonstrating the other example of the display operation in the information display panel of this invention, respectively. (A)-(d) is a figure for demonstrating an example of the state which actually writes information with the pen-type writing device with respect to the information display panel of this invention, respectively. (A)-(d) is a figure for demonstrating the other example of the state which actually writes information with the pen-type writing device with respect to the information display panel of this invention, respectively.

Explanation of symbols

1, 2 Substrate 3 Display medium (particle group)
3W white display medium 3Wa white display medium particles (white negatively charged particles)
3B Black display medium 3Ba Black display medium particles (black positively charged particles)
3W- White display medium (negative charge)
3W + black display medium (plus charge)
3B + Black display medium (plus charge)
3R- Red display medium (negative charge)
3R + Red display medium (plus charge)
4 Partition 5 and 6 Electrode 7 Cell 11 Microcapsule 12 Insulating liquid 21 Pen-type writing device 22 Information display panel

Claims (7)

  A combination of three colors and four types of display media including charged particles, each having two different colors, is sealed in a cell space formed between the substrates and formed by the partition walls. A writable information display panel in which display information can be rewritten by applying an electric field, and a background color display medium (plus charge) / first display color display medium (minus) as a combination of three colors and four types of display media Charge) is placed in one cell, background color display medium (minus charge) / second color display medium (plus charge) is placed in an adjacent cell, and a positively charged pen type writer on the observation side substrate of the panel The first display color information is displayed by moving and the second display color information display is performed by moving a negatively charged pen type writing device on the observation side substrate of the panel. That writable information display panel.   A transparent conductive member for applying a voltage when rewriting display information and erasing display information is arranged as a solid electrode on the observation side substrate in contact with the pen-type writer, and the display information is erased and erased on the back side substrate. 2. The writable information display panel according to claim 1, wherein a conductive member for applying a voltage is arranged as an electrode corresponding to each cell.   A transparent conductive member for applying a voltage when rewriting display information and erasing display information is arranged as an electrode corresponding to each cell on the observation side substrate with which the pen-type writer is brought into contact. 2. The writable information display panel according to claim 1, wherein a conductive member for applying a voltage when erasing display information is arranged as an electrode corresponding to each cell.   A voltage applying means and a power source for applying a predetermined voltage to the conductive member at the time of rewriting display information and erasing display information are mounted, and a predetermined voltage is applied to the conductive member to display or display information such as an image. 4. The writable information display panel according to claim 2, wherein information is erased.   The pen-type writing device is equipped with a pen tip electrode, and a pen tip electrode voltage switching device and a power source (battery) for applying a voltage to the pen tip electrode are built in, and applied to the pen tip electrode by operating the changeover switch. The writable information display according to any one of claims 1 to 4, wherein the voltage polarity to be switched can be switched between a positive voltage application state, a negative voltage application state, and a voltage application OFF state. panel.   6. The writable information display according to claim 5, wherein the pen tip electrode of the pen type writing device has the same area as one display unit area of the information display panel, and the pen tip edge is rounded. panel. The writable information display panel according to claim 3,
A display medium is moved by an electric field generated by applying a voltage to a counter electrode pair corresponding to a cell containing a combination of two types of background color display medium / display color display medium; After displaying with one display color, turn off the applied power,
Next, it corresponds to a cell in which another type of combination which was not used for the previous display among the combinations of the pen tip electrode of the pen-type writing device and the two types of background color display medium / display color display medium is accommodated. A method of using a writable information display panel, wherein a display of another color is written by moving on the observation substrate of the panel in a state where voltages having different potentials from the back side electrode are applied.

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