JP2010160251A - Panel for information display and electronic pop and electronic shelf label using same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a panel for information display capable of identifying a character and the like as a clear picture even in a slanted presentation form such as italic notation and also capable of changing an impression conveyed from a character in inscribed textual information according to an area in the case of area color display, and an electronic POP and an electronic shelf label using the same. <P>SOLUTION: In the panel for information display, at least two display media, which are composed as particle groups including particles having at least optical reflectivity and electrostatic chargeability and in which at least the optical reflectivity and electrostatic chargeability are different from each other, are disposed in each of a plurality of cells formed by being surrounded with partitions between panel boards and are subjected to reverse driving by an electric field formed between counter electrodes, which are formed by opposed electrodes disposed on both of the two panel boards, so that information image is displayed. Whole display screen is composed of at least two display areas obtained by dividing the whole display screen either lengthwise or crosswise. A dot shape of pixel arranged in each display area is differently composed. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  According to the present invention, at least two types of display media that are configured as a particle group including particles having at least optical reflectance and chargeability and that have at least different optical reflectance and charging characteristics are separated by a partition between panel substrates. An information display such as an image is performed by inverting driving with an electric field formed between the counter electrodes formed by arranging the electrodes provided on both of the two panel substrates so as to face each other. The present invention relates to an information display panel, and more particularly to an information display panel that performs dot matrix display by passive drive or active drive, and an electronic POP and an electronic shelf label using the same.

  Conventionally, as a charged particle movement type information display panel that drives a group of particles containing a chargeable particle as a display medium, the panel substrates are partitioned by a partition, and the cell is surrounded by the partition. , At least two types of display media that are configured as a particle group including particles having at least optical reflectivity and chargeability, and at least different from each other in optical reflectivity and charge characteristics, and between counter electrodes provided on a substrate An information display panel for displaying information such as an image by forming an electric field and moving a display medium is known.

  In addition, at least two types of display media that are configured as a particle group including particles having at least an optical reflectance and a charging property and have at least two optical reflectances and different charging characteristics are different in color and charging polarity. A combination of types of display medium particle groups is enclosed in one cell, and another combination of two types of display medium particle groups having different colors and charging polarities is enclosed in one cell, so that they are displayed separately from each other. There is also known an information display panel in which cells in which a combination of medium particle groups is enclosed are collected as separate cell groups, and the display screen is arranged for each divided area (area) to perform area color display. (For example, refer to Patent Document 1).

JP 2005-301030 A

  FIGS. 17A and 17B are diagrams for explaining the problems of the conventional information display panel. In the dot matrix display panel, as shown in FIGS. 17A and 17B, square pixels (dots) are arranged in a matrix on the entire screen. Although a square pixel dot is shown here, it may be a rectangular pixel dot. In this case, for example, when the Arabic numeral “1” is represented normally, as shown in FIG. 17A, “1” is written in a state where square dots are arranged in a line. “1” can be recognized. However, in the case of expressing in italic notation (italic notation), as shown in FIG. 17B, “1” is expressed in a state where square dots are arranged in a diagonal line, so that “1” is a clear image. There was a problem that could not be recognized.

  Also, even in an area color display panel that divides the screen into a plurality of display areas and displays different colors in each area, the pixel shape and pixel size that become dots differ only in the display color depending on the area. Since they are configured in the same way, there is a problem that display that changes the impression transmitted from the characters of the character information described by the area cannot be performed.

  The object of the present invention is to solve the above-mentioned problems and to recognize characters and the like as a clear image even in a slanting display such as italic notation, and in the case of area color display, the character information indicated by the area is displayed. It is an object of the present invention to provide an information display panel capable of changing the impression transmitted from characters, an electronic POP using the information display panel, and an electronic shelf label.

  An information display panel according to the present invention includes at least two types of display media configured as a particle group including particles having at least optical reflectivity and chargeability, and having at least two optical reflectivities and different charge characteristics. An information image is arranged in each of a plurality of cells formed by enclosing a partition wall between substrates and is inverted by an electric field formed between counter electrodes formed so that electrodes provided on both panel substrates face each other. In the information display panel for displaying the image, the entire display screen is composed of at least two display areas divided in either the vertical direction or the horizontal direction, and the shape of the pixel dots arranged in each display area is different. It is characterized by.

  As a preferred example of the information display panel of the present invention, a combination of at least two kinds of display media enclosed in the cells arranged in the respective display areas is used as a combination of different colors. Different display colors can be obtained, and the shape of the pixel dots arranged in the respective display areas is a quadrangle, and one of the sides opposite to the square pixel dots arranged in the other display areas. The lengths of the sides of the set are the same and the lengths of the other side of the set are different, and the shape of the pixel dots arranged in each of the display areas is a quadrangle, The pixel dot shape is square or rectangular, and the pixel dot in the other display area is a rhombus or parallelogram. The cell shape and the pixel dot shape are the same. To, to the formation of the partition wall so as to surround the pixel dots, there is.

  Furthermore, the electronic POP and the electronic shelf label of the present invention are characterized in that they are formed as information display boards using the information display panel described above.

  According to the present invention, at least two types of display media that are configured as a particle group including particles having at least an optical reflectance and a charging property and that are different from each other in at least an optical reflectance and a charging property are arranged between panel substrates. Displaying information such as images by placing the electrodes in each of a plurality of cells surrounded by a partition wall and inversion driven by an electric field formed between the counter electrodes formed on both sides of the two panel substrates facing each other In the information display panel for performing the above, the entire display screen is composed of at least two display areas divided in either the vertical direction or the horizontal direction, and the shape of the pixel dots arranged in each display area is different. A dot matrix type information display panel that can take at least two kinds of display variations on one screen is obtained.

  In addition, since the combination of at least two kinds of display media enclosed in cells arranged in at least two display areas divided and divided is a combination of different colors, different display colors can be obtained in the respective display areas. Thus, a dot matrix type information display panel rich in display variations in the combination of display color and pixel dot shape can be obtained.

(A), (b) is a figure for demonstrating an example of a structure of the information display panel used as the object of this invention, respectively. (A), (b) is a figure for demonstrating the other example of a structure of the information display panel used as the object of this invention, respectively. (A)-(d) is a figure for demonstrating the drive system and display system in the information display panel of this invention, respectively. It is a figure for demonstrating one specific example of a structure of the display area in the information display panel of this invention. It is a figure for demonstrating the other specific example of a structure of the display area in the information display panel of this invention. It is a figure for demonstrating the other specific example of a structure of the display area in the information display panel of this invention. It is a figure for demonstrating the other specific example of a structure of the display area in the information display panel of this invention. It is a figure for demonstrating one concept of the information display panel of this invention. It is a figure for demonstrating the 1st panel structural example of the information display panel of this invention. It is a figure for demonstrating the 2nd panel structural example of the information display panel of this invention. It is a figure for demonstrating the 3rd panel structural example of the information display panel of this invention. It is a figure for demonstrating the 4th panel structural example of the information display panel of this invention. It is a figure for demonstrating the example which applied the information display panel of this invention to the electronic POP. (A)-(d) is a figure for demonstrating the example which applied the information display panel of this invention to the electronic shelf label, respectively. (A)-(d) is a figure for demonstrating an example of the example of arrangement | positioning of the cell and pixel in the information display panel of this invention, respectively. (A)-(d) is a figure for demonstrating the other example of the example of arrangement | positioning of the cell and pixel in the information display panel of this invention, respectively. (A), (b) is a figure for demonstrating the problem of the conventional information display panel, respectively.

  First, the configuration of the information display panel that is the subject of the present invention will be described. In the information display panel which is an object 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 the stability when the display information is rewritten or when the display information is continuously displayed. 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 an information display panel that is an object of the present invention will be described with reference to FIGS. 1 (a) and (b) to FIGS. 2 (a) and 2 (b).

  In the example shown in FIGS. 1 (a) and 1 (b), at least two types of display media having different optical reflectivity and charging characteristics (here, configured as a particle group including particles having at least optical reflectivity and chargeability) 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). In the cell, in response to an electric field generated by applying a voltage to a pixel electrode pair formed by facing an electrode 5 (pixel electrode with TFT) provided on the substrate 1 and an electrode 6 (common electrode) provided on the substrate 2. The substrate 1 and 2 are moved vertically. Then, the white display medium 3W is visually recognized by the observer as shown in FIG. 1A, or the black display medium 3B is visually recognized by the observer as shown in FIG. 1B. Are displayed in a matrix with black and white dots. In addition, in FIG. 1 (a), (b), the partition in front is abbreviate | omitted.

  In the example shown in FIGS. 2A and 2B, at least two types of display media having different optical reflectance and charging characteristics (here, configured as a particle group including particles having at least optical reflectance and charging properties (here) 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). In the cell, 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. 2A, or 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. Are displayed in a matrix with black and white dots. In addition, in FIG. 2 (a), (b), the partition in front is abbreviate | omitted.

  The feature of the information display panel of the present invention is based on the information display panel having the structure described above, and is composed of at least two display areas in which the entire display screen is divided in either the vertical direction or the horizontal direction, and each display The pixel dots arranged in the region are different in shape.

  The driving method of the information display panel of the present invention may be either a passive driving method or an active driving method. In the case of passive driving, a pixel (dot) is formed by an overlapping portion of electrodes in which two substrates on which line electrodes are formed are opposed so that the line electrodes intersect. Square or rectangular dots are formed so as to face each other so as to intersect at right angles, or rhombuses or parallelogram dots are formed by intersecting diagonally. If the width of the line electrode to be opposed is changed for each display area, it is possible to form square dots having different pixel sizes for each display area. In the case of active driving, the shape of the pixel electrode formed with the TFT can be controlled to obtain the pixel-shaped electrode pair of the present invention.

  FIGS. 3A to 3D are diagrams for explaining a driving method and a display method in the information display panel of the present invention, respectively. In the example shown in FIG. 3A, an example of pixel (pixel) arrangement in a passive matrix panel composed of orthogonal line electrodes 5 and 6 is shown. In the example shown in FIG. 3B, an example of area color display including a display area 1 of, for example, white / red dot matrix display and a display area 2 of, for example, black-and-white dot matrix display, is shown on the passive matrix panel. . The example shown in FIG. 3C shows an example of pixel (pixel) arrangement in an active matrix type panel that drives each counter electrode with the pixel electrode 5 with the common electrode 6 TFT. In the example shown in FIG. 3 (d), an example of area color display composed of, for example, a display area 1 of yellow-red dot matrix display and a display area 2 of yellow-black dot matrix display, for example, in the active matrix panel is shown. Yes.

  4 to 7 are diagrams for explaining specific examples of area-specific color display in the information display panel of the present invention. In the examples shown in FIGS. 4 to 7, the same members as those in the examples shown in FIGS. 1A and 1B and FIGS. Omitted.

  FIG. 4 shows an example in which a display screen is divided into two upper and lower areas in a passive matrix driving panel using line electrodes 5 and 6 to form a black / white display area and a red / white display area. In the black / white display area, a black display medium 3B composed of a particle group including positively chargeable black particles 3Ba and a white display medium 3W composed of a particle group including negatively charged white particles 3Wa are surrounded by a partition wall 4. It is configured by filling the cell. In the red / white display area, a red display medium 3R composed of a particle group including positively charged red particles 3Ra and a white display medium 3W composed of a particle group including negatively charged white particles 3Wa are surrounded by a partition wall 4. It is configured by filling the cell. Here, the cell shape is associated with the pixel dot shape.

  FIG. 5 shows an example of a passive matrix driving panel using line electrodes 5 and 6 in which the display screen is divided into two upper and lower areas to form a black / yellow display area and a black / white display area. In the black / yellow display area, a black display medium 3B composed of a particle group including positively chargeable black particles 3Ba and a yellow display medium 3Y composed of a particle group including negatively chargeable yellow particles 3Ya are surrounded by a partition wall 4. It is configured by filling the cell. In the black / white display area, a black display medium 3B composed of a particle group including positively charged black particles 3Ba and a white display medium 3W composed of a particle group including negatively charged white particles 3Wa are surrounded by a partition wall 4. It is configured by filling the cell. Here, the cell shape is associated with the pixel dot shape.

  FIG. 6 shows an active matrix drive panel using a common electrode 6 and a pixel electrode 5 with TFT and a TFT, and the display screen is divided into two upper and lower areas to form a black / white display area and a red / white display area. An example is shown. In the black / white display area, a black display medium 3B composed of a particle group including positively charged black particles 3Ba and a white display medium 3W composed of a particle group including negatively charged white particles 3Wa are surrounded by a partition wall 4. It is configured by filling the cell. In the red / white display area, a red display medium 3R composed of a particle group including positively charged red particles 3Ra and a white display medium 3W composed of a particle group including negatively charged white particles 3Wa are surrounded by a partition wall 4. It is configured by filling the cell. Here, the cell shape is associated with the pixel dot shape.

  FIG. 7 shows an active matrix driving panel using the common electrode 6 and the pixel electrode 5 with TFT and the TFT, and the display screen is divided into two upper and lower areas to form a black / yellow display area and a black / white display area. An example is shown. In the black / yellow display area, a black display medium 3B composed of a particle group including positively chargeable black particles 3Ba and a yellow display medium 3Y composed of a particle group including negatively chargeable yellow particles 3Ya are surrounded by a partition wall 4. It is configured by filling the cell. In the black / white display area, a black display medium 3B composed of a particle group including positively charged black particles 3Ba and a white display medium 3W composed of a particle group including negatively charged white particles 3Wa are surrounded by a partition wall 4. It is configured by filling the cell. Here, the cell shape is associated with the pixel dot shape.

  FIG. 8 is a diagram for explaining one concept of the information display panel of the present invention. In the example shown in FIG. 8, a case where “1” is expressed in italic notation (italic notation) is described. The counter electrodes 5 and 6 and the partition 4 are configured so that parallelogrammatic pixel dots (shown here as counter electrodes) are horizontal in the horizontal direction and diagonal in the vertical direction. In this example, the counter electrodes 5 and 6 and the partition 4 are arranged in accordance with the characters to be displayed (in this case, italic notation). Specifically, the inclination of the character to be displayed is matched with the inclination of the counter electrodes 5 and 6 and the partition wall 4 in the vertical direction. In the example shown in FIG. 8, a straight line in the vertical direction is displayed in italics on the screen, and a display expressed in an oblique manner is obtained without shifting the position for each pixel (dot). As a result, italicized “1” can be recognized as a clear image.

  Next, a configuration example of the information display panel of the present invention will be described with reference to FIGS.

<First panel configuration example>
FIG. 9 is a diagram for explaining a first panel configuration example of the information display panel of the present invention. The first panel configuration example shown in FIG. 9 shows an example in which the numeral “2” is displayed in a dot matrix in each of the three display areas. Here, since the outline is shown here, the number of line electrodes is actually compared. If so, the number is very small.

  In the first panel configuration example shown in FIG. 9, the observation-side panel substrate 2 is provided with a straight line electrode 6 having the same width and the rear-side panel substrate 1 has the same width and corresponds to the display areas 11, 12, and 13. The line electrode 5 having the broken line structure is provided, and the two substrates 1 and 2 are bonded so that the line electrodes 5 and 6 cross each other to form an information display panel. The display area 11, 12, 13 has a configuration in which the entire screen is divided into three in the horizontal direction, and different display variations can be obtained in each display area 11, 12, 13. Here, the display area 11 in the upper stage of the screen is a parallelogram pixel (dot), and a white display medium and a black display medium are combined in a cell formed by a partition formed around the pixel. . Further, the display area 12 in the middle stage of the screen is a rectangular pixel (dot), and a white display medium and a black display medium are combined in a cell formed by a partition formed around the pixel. Further, the display area 13 at the lower stage of the screen is a parallelogram pixel (dot), and a white display medium and a red display medium are combined in a cell formed by a partition formed around the pixel. Then, dot matrix display is performed by passive driving corresponding to each display area on the entire screen. The line electrode formed on the observation side panel substrate may have a polygonal line structure in the vertical direction with respect to the screen, and the line electrode formed on the back side panel substrate may have a linear structure in the horizontal direction with respect to the screen.

<Second panel configuration example>
FIG. 10 is a diagram for explaining a second panel configuration example of the information display panel of the present invention. The second panel configuration example shown in FIG. 10 shows an example in which the number “2” is displayed in a dot matrix in each of the two display areas. Here, the outline is shown here, so the number of line electrodes is actually compared. If so, the number is very small.

  In the second panel configuration example shown in FIG. 10, the observation-side panel substrate 2 is provided with a line electrode 5 having a large width in the display area 11 at the upper stage of the screen and a line electrode 5 having a narrow width in the display area 13 at the lower stage of the screen. The back side panel substrate 1 is provided with line electrodes 5 having the same width, and the two substrates 1 and 2 are bonded together so that the line electrodes 5 and 6 cross each other to form an information display panel. The display areas 11 and 13 are obtained by dividing the entire screen into two in the horizontal direction, and different display variations can be obtained in the display areas 11 and 13. Here, the display area 11 in the upper stage of the screen is a vertically long rectangular pixel (dot), and a white display medium and a black display medium are combined in a cell formed by a partition formed around the pixel. . Further, the display area 13 at the lower stage of the screen is a square pixel (dot), and a white display medium and a black display medium are combined and arranged in a cell formed by a partition formed around the pixel. Then, dot matrix display is performed by passive driving corresponding to each display area on the entire screen. The line electrode formed on the observation side panel substrate may have a polygonal line structure in the vertical direction with respect to the screen, and the line electrode formed on the back side panel substrate may have a linear structure in the horizontal direction with respect to the screen.

<Third panel configuration example>
FIG. 11 is a diagram for explaining a third panel configuration example of the information display panel of the present invention. The third panel configuration example shown in FIG. 11 shows an example in which the numeral “2” is displayed in a dot matrix in each of the two display areas. Here, since the outline is shown here, the number of line electrodes is actually compared. If so, the number is very small.

  In the third panel configuration example shown in FIG. 11, the observation-side panel substrate 2 is provided with a straight line electrode 6 having the same width, and the rear-side panel substrate 1 has the same width and a broken line corresponding to the display regions 11 and 13. A line electrode 5 having a structure is provided, and two substrates are opposed to each other so that the line electrodes 5 and 6 cross each other to form an information display panel. The display areas 11 and 13 are obtained by dividing the entire screen into two in the horizontal direction, and different display variations can be obtained in the display areas 11 and 13. Here, the display area 11 in the upper stage of the screen is a parallelogram pixel (dot), and a white display medium and a black display medium are combined in a cell formed by a partition formed around the pixel. . Further, the display area 13 at the lower stage of the screen is a rectangular pixel (dot), and a white display medium and a black display medium are combined and arranged in a cell formed by a partition formed around the pixel. Then, dot matrix display is performed by passive driving corresponding to each display area on the entire screen. The line electrode formed on the observation side panel substrate may have a polygonal line structure in the vertical direction with respect to the screen, and the line electrode formed on the back side panel substrate may have a linear structure in the horizontal direction with respect to the screen.

<Fourth panel configuration example>
FIG. 12 is a diagram for explaining a fourth panel configuration example of the information display panel of the present invention. The fourth panel configuration example shown in FIG. 12 shows an example in which the numeral “2” is displayed in a dot matrix in each of the two display areas. Here, since the outline is shown here, the number of line electrodes is actually compared. If so, the number is very small.

  In the fourth panel configuration example shown in FIG. 12, the observation-side panel substrate 2 is provided with a straight line electrode 6 having the same width and the back-side panel substrate 1 has the same width and a broken line corresponding to the display areas 11 and 13. A line electrode 5 having a structure is provided, and two substrates are opposed to each other so that the line electrodes 5 and 6 cross each other to form an information display panel. The display areas 11 and 13 are obtained by dividing the entire screen into two in the horizontal direction, and different display variations can be obtained in the display areas 11 and 13. Here, the display area 11 in the upper stage of the screen is a rectangular pixel (dot), and a white display medium and a black display medium are combined in a cell formed by a partition formed around the pixel. Further, the display area 13 at the lower stage of the screen is a parallelogram pixel (dot), and a white display medium and a red display medium are combined and arranged in a cell formed by a partition formed around the pixel. Then, dot matrix display is performed by passive driving corresponding to each display area on the entire screen. The line electrode formed on the observation side panel substrate may have a polygonal line structure in the vertical direction with respect to the screen, and the line electrode formed on the back side panel substrate may have a linear structure in the horizontal direction with respect to the screen.

  Next, an example in which the information display panel of the present invention is applied to an electronic POP and an electronic shelf label will be described with reference to FIGS. 13 and 14A to 14D.

  FIG. 13 is a diagram for explaining an example in which the information display panel of the present invention is applied to an electronic POP. In the example shown in FIG. 13, the entire screen is divided into left and right parts, and is composed of display areas 14 and 15. The left display area 14 is a color display unit in which a white display medium and a black display medium are arranged in each cell, a color filter of RGB three primary colors is arranged, and RGB color dots are arranged in a matrix, and the dot shape is square. Or it is made into the rectangle and it is comprised so that a color information image can be displayed. The display area 15 on the right side is a display unit in which monochrome dots in which a white display medium and a black display medium are arranged in each cell are arranged in a matrix, and the dot shape is a parallelogram or a rhombus, and an obliquely inclined information image Can be displayed. The pixel dots arranged in a matrix on the entire screen can be driven passively or can be driven actively.

  FIGS. 14A to 14D are diagrams for explaining examples in which the information display panel of the present invention is applied to an electronic shelf label.

  In the example shown in FIG. 14A, the entire screen is divided into two vertically and is composed of display areas 11 and 13. The upper display area 11 is a red / white display portion in which red / white dots composed of a red display medium and a white display medium are arranged in a matrix, and the dot shape is a parallelogram or a rhombus, and the information is inclined obliquely. An image can be displayed. The lower display area 13 is a black / white display portion in which black / white dots composed of a black display medium and a white display medium are arranged in a matrix, and the dot shape is a square or a rectangle, and a normal information image is displayed. It is configured as possible.

  In the example shown in FIG. 14B, the screen is divided into three parts at the top and bottom, and the display areas 11, 12, and 13 are used. The upper display area 11 is a blue / white display portion in which blue / white dots made of a blue display medium and a white display medium are arranged in a matrix, and the dot shape is a parallelogram or a rhombus, and the information is inclined obliquely. An image can be displayed. The middle display area 12 is a black / white display section in which black / white dots made of a black display medium and a white display medium are arranged in a matrix, and the dot shape is square or rectangular, so that a normal information image can be displayed. It is configured. Further, the lower display area 13 is a red / white display portion in which red / white dots composed of a red display medium and a white display medium are arranged in a matrix, and the dot shape is a parallelogram or a rhombus, and the information is inclined obliquely. An image can be displayed.

  In the example shown in FIG. 14 (c), the entire screen is divided into two vertically and composed of display areas 11 and 13. In this example, both the upper display area 11 and the lower display area 13 are black / white display portions in which black / white dots made of a black display medium and a white display medium are arranged in a matrix, and the dot shape is square or rectangular. And a normal information image can be displayed. In the display area 11, the dot shape is configured to be vertically long as compared to the display area 13, and the information image that is vertically longer than the information image in the display area 13 can be displayed.

  In the example shown in FIG. 14 (d), the entire screen is divided into three vertically and composed of display areas 11, 12, and 13. The upper display area 11 is a blue / white display portion in which blue / white dots made of a blue display medium and a white display medium are arranged in a matrix, and the dot shape is a square or a rectangle so that a normal information image can be displayed. It is configured. The middle display area 12 is a black / white display section in which black / white dots made of a black display medium and a white display medium are arranged in a matrix, and the dot shape is square or rectangular, so that a normal information image can be displayed. It is configured. Further, the lower display area 13 is a red / white display portion in which red / white dots composed of a red display medium and a white display medium are arranged in a matrix, and the dot shape is a parallelogram or a rhombus, and the information is inclined obliquely. An image can be displayed.

  Next, each structural member which comprises the information display panel of this invention is demonstrated.

  The partition provided between the panel substrates has a function of securing the gap between the panel substrates and a function of suppressing the display medium particle group from moving in a direction parallel to the panel substrate. The width of the partition for securing the gap between panel substrates is preferably in the range of 20 μm to 100 μm, and the width of the partition dedicated for cell formation is preferably as narrow as possible in the range of 5 μm to 30 μm. In addition, the cell-dedicated partition walls may be lower than the height of the panel substrate gap securing partition, and the range that does not impair the function of suppressing the movement of particles in the display medium in a direction parallel to the panel substrate. And Furthermore, the cell formation dedicated partition wall may be formed at a position facing both panel substrates, and may be configured to face each other when the panel substrates are bonded together. In this case, the facing portions may or may not be joined. Also good.

  The shape and arrangement of the partition walls for securing the gap between the panel substrates and the shape and arrangement of the partition walls dedicated to cell formation are square shapes (including squares with rounded corners) and staircase octagons (including octagons with rounded corners). Included). A shape with rounded corners is preferable from the viewpoint that particles constituting the display medium can be easily moved.

  FIGS. 15A to 15D and FIGS. 16A to 16D show examples of the arrangement of cells and pixels in the information display panel of the present invention. The examples shown in FIGS. 15A to 15D show examples in which cells and pixels correspond to each other, and the examples shown in FIGS. 16A to 16D show examples in which cells and pixels do not correspond. Indicates.

  In the example shown in FIG. 15A, a rectangular pixel formed by a rectangular cell and a counter line electrode is shown. The example shown in FIG. 15B shows a parallelogram pixel formed by a parallelogram cell and a counter line electrode. In the example shown in FIG. 15C, a rectangular pixel formed by a staircase octagonal cell and a counter line electrode is shown. In the example shown in FIG. 15D, a rectangular pixel formed by a staircase octagonal cell and a counter pixel electrode is shown. In the above example, when at least two or more display areas are provided on the entire screen, pixel dots and cells are associated with each other in all display areas.

  In the example shown in FIG. 16A, a rectangular pixel formed by a rectangular cell and a counter orthogonal line electrode is shown. In the example shown in FIG. 16 (b), a parallelogram pixel formed by a quadrangular cell and opposing diagonal cross line electrodes is shown. In the example shown in FIG. 16C, a square pixel formed by a staircase octagonal cell and a counter orthogonal line electrode is shown. In the example shown in FIG. 16 (d), a parallelogram pixel formed by a square cell with rounded corners and an opposed diagonally intersecting line electrode is shown. The above example shows an example in which cells having the same shape are arranged on the entire screen even when at least two or more display regions having different pixel dot shapes are provided on the entire screen. Since cells having the same shape are arranged in the display area of parallelogram pixels and the display areas of quadrangular pixels of different sizes, there are places where the pixels do not correspond to the cells.

  A dry film resist material is preferably used as a material for forming a partition wall portion provided for securing a gap between substrates or a partition wall portion dedicated for cell formation. As an example, Alfo NIT2 (manufactured by Nichigo Morton) or PDF300 (manufactured by Nippon Steel Chemical Co., Ltd.) can be used.

  A dry film resist material having a thickness corresponding to the height of the partition wall to be formed is laminated on the panel substrate, and patterned by a photolithography method using a photomask having a predetermined shape.

  The width of the partition wall portion for securing the gap between the panel substrates is in the range of 20 μm to 100 μm, the width of the partition wall portion dedicated for cell formation is in the range of 5 μm to 30 μm, and the width of the partition wall portion dedicated for cell formation is between the panel substrates. It is preferable to make the width smaller than the width of the partition for securing the gap because the cell aperture ratio in the display area is increased and the display portion becomes larger.

  The width of the partition for securing the gap between the panel substrates (area boundary partition), which becomes the boundary between the display areas having different display variations, is set in the range of 20 μm to 200 μm, and is larger than the partition for securing the gap between the panel substrates. Also good.

  At the boundary of each display area, a boundary partition is formed as a partition that performs both functions of cell formation and securing the gap between panel substrates. Inside each display area, both functions of forming the cell and securing the gap between panel substrates are provided. And the partition wall for cell formation, and the relationship between the widths of the partition walls is that the width of the boundary partition wall is equal to or greater than the width of the partition wall for both cell formation and securing the gap between the panel substrates. Preferably, the width. By making the width of the boundary partition wall thick within a range of 20 μm to 200 μm, the boundary of the display area becomes clear and a wide range of adhesives used for bonding to the panel substrate can be disposed and firmly bonded. In addition, the width of the partition walls for both functions of forming the cells arranged inside each display area and securing the gap between the panel substrates is set in a range of 20 μm to 100 μm, and the width of the partition walls for forming cells arranged inside each display area is It is also preferable to make it the range of 5 micrometers-30 micrometers. Since the partition wall is a non-display part, it is desirable to make the partition wall width as narrow as possible, but it is not necessary to support the substrate in order to ensure the gap between the panel substrates. It becomes.

  Among the conductive films to be disposed as opposed electrodes, the electrodes provided on the transparent substrate side include indium tin oxide (ITO), indium oxide, zinc-doped indium oxide (IZO), aluminum-doped zinc oxide (AZO), and antimony tin. Transparent conductive films formed of transparent conductive metal oxides such as oxide (ATO), conductive tin oxide, and conductive zinc oxide, and transparent conductive polymers such as polyaniline, polypyrrole, and polythiophene are used.

  As the conductive film used as the electrode provided on the back side substrate, indium tin oxide (ITO), indium oxide, zinc doped indium oxide (IZO), aluminum doped zinc oxide (AZO), antimony tin oxide (ATO), conductive oxide Conductive metal oxides such as tin and conductive zinc oxide, conductive polymers such as polyaniline, polypyrrole and polythiophene, metals such as gold, silver, copper, aluminum, nickel and chromium, and these metals as the main components A conductive film formed of an alloy is used. The electrode provided on the back side substrate may be transparent or may not be transparent.

  As a method for forming a conductive film as an electrode, a method of forming 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 a metal foil (for example, a rolled copper foil) is used. A laminating method or a method of applying a conductive agent mixed with a solvent or a synthetic resin binder is used. The above-mentioned material that can be patterned and is electrically conductive can be preferably used. Note that the thickness of the transparent conductive film provided in the display area on the display surface side is preferably 0.01 to 10 μm, more preferably 0.05 to 5 μm, as long as conductivity can be secured and light transmittance is not hindered. In addition, the thickness of the conductive film provided in the region other than the back side and the display region may be set in a range of 0.01 to 10 μm as long as conductivity can be ensured.

  A transparent conductive material suitable as a transparent electrode is less flexible than a metal material. When the electrode provided in the display surface side display region is a line electrode, it is preferably used in combination with a thin metal wire in order to prevent disconnection in the transparent electrode material. The width of the fine metal wire is preferably 1 μm to 10 μm because it does not hinder display visibility. Since the electrodes provided on the back side and the region other than the display region do not need to consider light transmittance, the metal material having a small electric resistance and excellent flexibility is preferably used.

  The information display panel of the present invention is used as an electronic POP (Point of Presence, Point of Purchase advertising) or an electronic shelf label, as well as a display unit of a mobile device such as a notebook computer, PDA, mobile phone, handy terminal, or electronic book. , Electronic newspapers such as electronic newspapers, electronic manuals (instruction manuals), signboards, posters, bulletin boards such as blackboards, calculators, home appliances, display parts for automobiles, card displays such as point cards and IC cards, electronic advertisements It is also suitably used as an electronic price tag, an electronic score, a display unit of an RF-ID device, or a display unit (so-called rewritable paper) that performs display rewriting by connecting to external display rewriting means.

1, 2 Substrate 3W White display medium 3Wa White negatively charged particle 3B Black display medium 3Ba Black positively charged particle 3R Red display medium 3Ra Red positively charged particle 3Y Yellow display medium 3Ya Yellow negatively charged particle 4 Bulkhead 5, 6 Electrode 11, 12, 13, 14, 15 Display area

Claims (7)

  At least two types of display media that are configured as a particle group including particles having at least optical reflectivity and chargeability and that are different from each other in at least optical reflectivity and charge characteristics are formed by being surrounded by a partition wall between panel substrates. In an information display panel that is arranged in each of a plurality of cells and displays an information image by inversion driving with an electric field formed between counter electrodes formed by opposing electrodes formed on both of two panel substrates, An information display panel characterized in that the entire display screen is composed of at least two display areas divided in either the vertical direction or the horizontal direction, and the shape of the pixel dots arranged in each display area is different.   The combination of at least two kinds of display media enclosed in the cells arranged in the respective display areas is a combination of different colors so that different display colors can be obtained in the respective display areas. Item 4. The information display panel according to Item 1.   The shape of the pixel dots arranged in each of the display areas is a quadrangle, and the length of a pair of sides opposite to the square pixel dots arranged in the other display areas is the same. The information display panel according to claim 1, wherein the set of sides has different lengths.   The pixel dots arranged in the respective display areas are square, the pixel dots in one display area are square or rectangular, and the pixel dots in the other display area are rhombus or parallelogram The information display panel according to claim 1, wherein the information display panel is configured as follows.   The information display panel according to claim 1, wherein the cell shape and the pixel dot shape are the same, and a partition wall is formed so as to surround the pixel dot.   An electronic POP characterized in that an information display board is formed using the information display panel according to any one of claims 1 to 5.   An electronic shelf label comprising an information display board using the information display panel according to any one of claims 1 to 5.

Images