JP2004045976A - Electronic paper and controller therefor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To make it possible to write images and characters to each sheet even if a plurality of sheets are piled. <P>SOLUTION: Assuming that k is an integer of 1 ≤ k ≤ N, an i-th (i =1, ..., N-k+1) page sector electrode on the front side is electrically connected to an (i+k)th page sector electrode on the back side; an i-th (i = N-k+2, ..., N+1) page sector electrode on the front side is electrically connected to an (i-N+k-1)th page sector electrode on the back side; a page enable signal is outputted from an N-th page sector electrode on the front side; each electrode is arranged so that when a plurality of sheets are piled and bound, each electrode on the back side of an electronic paper sheet is electrically connected to the corresponding electrode on the front side of a different electronic paper sheet opposite to the back side of that electronic paper sheet. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to electronic paper and a control device thereof.
[0002]
[Prior art]
Generally, electronic paper is a new technology, and combines the advantages of paper and electronic displays that are used every day. This electronic paper is a microcapsule electrophoresis type of MIT or E-Ink in the United States, a twist ball type of Xerox or 3M of the United States, a dichroic dye / liquid crystal type of Tokai University or Dai Nippon Printing, a liquid crystal / organic photoreceptor. Research and development have been made on composite film types, toner types, and the like. Many of these systems form an image with a charge pattern perpendicular to the film plane.
[0003]
[Problems to be solved by the invention]
Electronic paper is expected to be a display device that replaces the current paper.However, mock-ups announced by various manufacturers, such as electronic paper integrated into portable devices and integrated with control devices, are prominent. The benefits of thinness have not been fully exploited.
[0004]
Since it is not assumed that the sheets are used repeatedly like ordinary paper, there is a problem that a plurality of sheets cannot be handled at the same time. Further, there is a problem that it is difficult to use the image display control device separately from the image display control device.
[0005]
The present invention has been made in consideration of the above circumstances, and has as its object to provide an electronic paper capable of writing an image or a character on each of them even when a plurality of sheets are stacked, and a control device therefor.
[0006]
[Means for Solving the Problems]
The electronic paper according to the present invention is provided with a plurality of row electrodes, a plurality of column electrodes arranged so as to intersect the plurality of row electrodes, and at each intersection of the row electrode and the column electrode, a corresponding row. An image display unit having a pixel for displaying an image based on the charge pattern of the electrode and the column electrode, a plurality of row selector electrodes provided on the front side and the back side with respect to the plurality of row electrodes, and the plurality of rows, respectively. A plurality of column selector electrodes provided on the front side and the back side with respect to the column electrode; first to N + 1 (N ≧ 2) page selector electrodes provided at corresponding positions on the front side and the back side; , The connection between the row electrode and the corresponding row selector electrode and the connection between the column electrode and the corresponding column selector electrode are simultaneously performed. A first page enable circuit for turning on or off, and when k is an integer from 1 to N, the i-th (i = 1,..., N−k + 1) page selector electrode on the front side Are electrically connected to the (i + k) th page selector electrode on the back side, and the i-th (i = N−k + 2,..., N + 1) page selector electrode on the front side is connected to the (i−N + k−1) th page selector electrode on the back side. The first page enable signal is output from the N-th page selector electrode on the front side, which is electrically connected to a page selector electrode, and each of the electrodes is an electronic paper when a plurality of sheets are stapled together. Are arranged so as to be electrically connected to corresponding electrodes on the front side of electronic paper different from the electronic paper facing the back side.
[0007]
Note that the k is an integer of 2 or more, and the image display unit is provided on each of the front side and the back side, and the first page enable circuit is configured to output the image data on the front side based on the first page enable signal. The connection between the row electrode of the image display unit and the corresponding row selector electrode and the connection between the column electrode of the image display unit on the front side and the corresponding column selector electrode are simultaneously turned on or off, and the N + 1-kth on the front side is turned on. The potential level of the page selector electrode is used as a second page enable signal. Based on the second page enable signal, the connection between the row electrode of the rear image display unit and the corresponding row selector electrode and the connection of the rear Second page enable for simultaneously turning on or off the connection between the column electrode of the image display unit and the corresponding column selector electrode It may be configured to further include a road.
[0008]
A drain is provided for each of the pixels, a drain is connected to a driving power supply, a source is connected to a row electrode of the corresponding pixel, and a gate is connected to the corresponding row via the first and second page enable circuits. You may comprise so that it may have the selection transistor connected to a selector electrode.
[0009]
The electronic paper control device according to the present invention includes a pair of binders capable of binding any one of the electronic papers, and each of the binders is located at a position corresponding to a position where each electrode of the electronic paper is provided. Electrodes are provided, and each of these electrodes is electrically connected to a corresponding electrode of the electronic paper that contacts the binder when the electronic paper is bound.
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings.
[0011]
(1st Embodiment)
In general, electronic paper has an image display section of one page per electronic paper, that is, an image that can be displayed only on the front side, and an image display section of two pages per sheet, that is, an image that has an image depending on the specification application. Some items can be displayed on the front and back sides.
[0012]
In the electronic paper according to the first embodiment of the present invention, an image can be displayed only on the front side, that is, one electronic paper has an image display unit of one page. FIG. 6 shows the appearance of the electronic paper of the present embodiment. FIG. 6A shows the front surface of the electronic paper, and FIG. 6B shows the back surface of the electronic paper, which constitutes one electronic paper. Taking the surface as an example, the left end is a portion where the electrode unit and the driving unit are placed, and is a portion fixed to a folder by a binder with a binding hole for fixing a page. Here, it is also electrically connected to the electrode of the binder. The right side is an image display section, on which images and characters are displayed. FIG. 7 is an enlarged view of the upper left of FIG. 6 for easy understanding.
[0013]
The image display unit includes a plurality of row electrodes (not shown), a plurality of column electrodes (not shown) arranged to intersect these row electrodes, and an intersection of the row electrodes and the column electrodes. And a pixel (not shown) provided between the row electrode and the column electrode. FIG. 5 shows a configuration of a microcapsule electrophoretic pixel. The pixel shown in FIG. 5 is made of microcapsule ink, and this microcapsule ink has a blue liquid and negatively charged white particles in a capsule. Therefore, if the potential of the row electrode (the upper electrode in FIG. 5) is negative and the potential of the column electrode (the lower electrode in FIG. 5) is positive, the white particles in the capsule are pulled by the column electrode, and The white particles are located on the side and the blue liquid is located on the upper side. When the potential of the row electrode is positive and the potential of the column electrode is negative, white particles are located on the upper side and blue liquid is located on the lower side in the capsule, whereby a state is obtained in which information is written to the pixel.
[0014]
FIG. 8 shows a usage example of the electronic paper according to the present embodiment, and a specific example of an electronic paper control device including a controller for changing a display image and a folder including a battery. The folder is provided with a binder for binding electronic paper. When the electronic paper is bound in the binder, the electrode is provided at a position corresponding to the electrode of the electrode portion of the electronic paper.
[0015]
FIG. 1 shows the configuration of the electronic paper according to the present embodiment. In the electronic paper of this embodiment, the pixel display section includes a plurality of row electrodes 2, a column electrode 4 arranged to intersect with the row electrodes 2, and an intersection between the row electrodes 2 and the column electrodes 4. And a microcapsule electrophoresis type pixel 6 provided between the row electrode 2 and the column electrode 4. Pixels in the same row are connected to the same row electrode, and pixels in the same column are connected to the same column electrode. In the present embodiment, the electronic paper is a simple matrix type electronic paper.
[0016]
Further, in the electronic paper of the present embodiment, the page overflow electrode 11 and the page selector electrode 13 ₁ ~ 13 _{N + 1} And the row selector electrode 15 ₁ ... and the column selector electrode 17 ₁ Are provided, and a page overflow electrode 21 and a page selector electrode 23 are provided at positions on the back side of the page corresponding to the ends on the front side of the page. ₁ ~ 23 _{N + 1} And the row selector electrode 25 ₁ , And the column selector electrode 27 ₁ .. Are provided. N indicates the maximum number of electronic papers that can be bound in a folder at one time. In addition, the electrodes are arranged such that electrodes of the same row of different electronic papers are in contact with each other and are electrically connected when a plurality of the electrodes are stacked.
[0017]
The page overflow electrode 21 on the back side of the page is electrically connected to the page overflow electrode 11 on the front side of the page, and is also connected to a page overflow detection circuit 30 provided in the electronic paper. The page overflow detection circuit 30 has a drain connected to the page overflow electrode 21 and a gate connected to the page selector electrode 23 on the back side of the page. ₁ And an N-channel MOS transistor 31 whose source is connected to the ground power supply. Further, a driving power supply is applied to the page overflow electrode 11 via a resistor.
[0018]
Page selector electrode 13 on the front side of the page _i (I = 1,..., N) are the page selector electrodes 23 on the back side of the page. _{i + 1} Is electrically connected to the page selector electrode 13 on the front side of the page. _{N + 1} Is the page selector electrode 23 on the back side of the page ₁ It is configured to be connected to Front page selector electrode 13 _N That is, the page selector electrode 23 on the back side _{N + 1} Thus, a page enable signal used when writing information on the electronic paper of the present embodiment is output and sent to the page enable circuit 40. The page enable circuit 40 includes an N-channel MOS transistor 41 provided corresponding to the plurality of row electrodes 2. ₁ ,..., N-channel MOS transistors 43 provided corresponding to the plurality of column electrodes 4 ₁ ,... Transistor 41 _i (I = 1,...) Means that the drain is the row selector electrode 25 _i , The source is connected to the corresponding row electrode 2, and the gate receives the page enable signal. Also, the transistor 43 _i (I = 1,...) Indicates the column selector electrode 27 whose drain is on the back side. _i , The source is connected to the corresponding column electrode 4, and the gate receives the page enable signal.
[0019]
Row selector electrode 15 on the front side of the page _i (I = 1,...) Is the row selector electrode 25 on the back side of the page. _i And the column selector electrode 17 on the front side of the page. _i Is the column selector electrode 27 on the back side of the page _i It is configured to be connected to Also, each row selector electrode 15 _i (I = 1,...) Are connected to the row selector circuit 110 provided in the controller of the electronic paper control device shown in FIG. _i (I = 1,...) Are connected to the column selector circuit 120 provided in the controller of the electronic paper control device shown in FIG.
[0020]
The row selector circuit 110 is connected to each row selector electrode 15. _i (I = 1,...), And includes P-channel MOS transistors 111 and 113, N-channel MOS transistors 114 and 115, and an inverter 112. The MOS transistors 111, 113, 114, and 115 are cascaded, the source of the transistor 111 is connected to a driving power supply, and the source of the transistor 115 is connected to a ground power supply. Row data / Row Data written to a pixel connected to the row selector is input to the gates of the transistors 111 and 115, and a signal Row Enable for enabling the corresponding row electrode is input to the gate of the transistor 114. The signal Row Enable is input to the gate of the transistor 113 via the inverter 112.
[0021]
The column selector circuit 120 is connected to each column selector electrode 17. _i (I = 1,...), And includes P-channel MOS transistors 121 and 123, N-channel MOS transistors 124 and 125, and an inverter 122. The MOS transistors 121, 123, 124, and 125 are cascaded, the source of the transistor 121 is connected to the drive power supply, and the source of the transistor 125 is connected to the ground power supply. Column data Column Data to be written to a pixel connected to the column selector circuit 120 is input to the gates of the transistors 121 and 125, and a signal Column Enable for enabling the corresponding column electrode is input to the gate of the transistor 124. The signal Column Enable is input to the gate of the transistor 123 via the inverter 122.
[0022]
In the present embodiment, the page selector electrodes are connected by being shifted by one at the front and back of the page, but this is not limited to one and may be shifted by a predetermined number.
[0023]
Next, the operation of the electronic paper of the present embodiment will be described. As in general electronic paper, a specific pixel is selected by a row selector circuit and a column selector circuit, and white and blue are switched by applying positive and negative charges to the specific pixel. This is repeated for all pixels to form an image.
[0024]
A method of setting a plurality of electronic papers in a folder constituting the electronic paper control device shown in FIG. 8 and checking the total number of sheets bound with a binder will be described with reference to FIG. FIG. 2 shows an example in which the maximum number of electronic papers that can be bound in a folder at one time is ten. In FIG. 2, there are eleven page selector electrodes on each of the front side and the back side, and for simplicity, in FIG. 2, the electrically connected electrodes are given the same numbers. That is, in FIG. 2, the electrodes are assigned numbers D1 to D11. When the potential level of the page selector electrode D1 on the front side of the first page is set to High and the potential levels of the other page selector electrodes D2 to D11 on the front side are set to Low by the controller of the electronic paper control device, the back side of the electronic paper on the last page. The potential level of the (total number of pages + 1) -th page selector electrode becomes High. For example, when seven electronic papers are bound in the binder, the potential level of the eighth (= 7 + 1) -th electrode D1 from the top on the back side of the seventh electronic paper becomes High. The electrodes whose potential level is High are indicated by oblique lines in FIG.
[0025]
Since the binder has a configuration in which the electrode is provided at a position corresponding to the position where the electrode of the electronic paper is provided, the potential level of any page selector electrode on the back side of the electronic paper of the last page becomes High. Can be detected. This allows the controller of the electronic paper control device to recognize the number of electronic papers bound to the binder at the position of the page selector electrode on the back side of the electronic paper where the potential level becomes High.
[0026]
Next, in the present embodiment, when the number of electronic papers exceeding the maximum number (predetermined number) specified by the number of page selector electrodes of the electronic paper is bound to the binder, the operation of the electronic paper of the predetermined number or more is guaranteed. Not done. For this reason, when a predetermined number or more of electronic papers are bound, the controller can recognize the binding. This will be described with reference to FIG.
[0027]
When the potential level of the first page selector electrode D1 on the front side is set to High and the potential levels of the other page selector electrodes are set to Low, the total number can be known as described above if the number is within the predetermined number. When the number exceeds the number, the potential levels of the page overflow electrodes 11 and 21 become Low. For example, although the predetermined number is 10 in FIG. 3, but 11 or more electronic papers are bound to the binder, the first page selector electrode D1 on the back side of the eleventh electronic paper (in FIG. Electrode 23 ₁ ) Becomes High. As a result, the transistor 31 shown in FIG. 1 is turned on, and the potential levels of the page overflow electrodes 21 and 11 become low. When the electronic paper is bound by the binder, the controller needs to confirm the number of electronic papers and confirm page overflow.
[0028]
Next, a method of selecting a write page will be described with reference to FIG. To select a page to be written, it is necessary to set the corresponding page selector electrode to High. For example, when writing an image on the third page (third page in the present embodiment) of the electronic paper, an image writing controller built in the folder uses “(total number of pages) − (written page number)”. By setting the potential level of the page selector electrode calculated as “+1” to High, writing can be performed only on the page. For example, as shown in FIG. 4, when the sixth page is to be rewritten, (the total number of pages) − (the number of write pages) + 1 = 10−6 + 1 = 5, and the potential level of the fifth page selector electrode is set to High. I do. Then, the eleventh page selector electrode D5 on the back of the sixth electronic paper (in FIG. 1, the page selector electrode 23). _{N + 1} ) Becomes High. As shown in FIG. _{N + 1} Generates a page enable signal, and row and column data are written to the electronic paper of the sixth page. Similarly, when writing to a plurality of pages is desired, the potential level of the corresponding page selector electrode may be set to High. If the potential levels of all page selector electrodes are set to High, the same contents can be written to all pages simultaneously.
[0029]
As described above, it is possible to use a plurality of the same electronic papers and write an image only on a page desired to be rewritten, or write an image on the selected plurality of pages of electronic paper at a time. After writing, it can be removed from the folder and handled like printed paper. Furthermore, since the electronic paper of the present embodiment has exactly the same circuit in each page, the pages in the folder can be freely replaced, added, or extracted.
[0030]
(2nd Embodiment)
In the electronic paper of the first embodiment, the pixel display unit is a simple matrix type, but may be an active matrix type. The case of the active matrix type will be described as a second embodiment of the present invention.
[0031]
FIG. 9 shows the configuration of the electronic paper according to the second embodiment of the present invention. The electronic paper according to the second embodiment has a pixel display portion of an active matrix type, and a selection transistor 8 composed of an N-channel MOSFET provided for each pixel in the electronic paper according to the first embodiment shown in FIG. And power supply electrodes 14 and 24 are newly provided. The power supply electrode 14 is provided on the front side of the electronic paper, and the power supply electrode 24 is provided on the back side and connected in common, and further connected to a drive power supply. The selection transistor 8 has a drain connected to the row electrode 2 of each pixel 6, a source connected to the power supply electrode 24, and a gate connected to the transistor 41 for selecting a row of the pixel. _i (I = 1,...).
[0032]
The electronic paper of the second embodiment can also obtain the same effects as those of the first embodiment. That is, it is possible to use a plurality of the same electronic papers and to write an image only on the page desired to be rewritten, or to write the image on the electronic paper of a plurality of selected pages at a time. After writing, it can be removed from the folder and handled like printed paper. Furthermore, since the electronic paper of the present embodiment has exactly the same circuit in each page, the pages in the folder can be freely replaced, added, or extracted.
[0033]
(Third embodiment)
Next, an electronic paper according to a third embodiment of the present invention will be described with reference to FIGS. The electronic paper according to the third embodiment is an electronic paper having an image display unit of two pages per electronic paper, that is, an electronic paper capable of displaying images on both the front surface and the back surface. FIG. .
[0034]
The electronic paper of this embodiment is different from the electronic paper of the first embodiment shown in FIG. 1 in that a page overflow detection circuit 30A is provided instead of the page overflow detection circuit 30, and another page enable circuit (not shown) is provided. In addition, the connection between the page selector electrode on the front side and the page selector electrode on the back side is changed. Front page selector electrode 13 _i (I = 1,..., N−1) are the page selector electrodes 23 on the back side. _{i + 2} And the page selector electrode 13 on the front side _N Is the back page selector electrode 23 ₁ And the page selector electrode 13 on the front side _{N + 1} Is the back page selector electrode 23 ₂ It is configured to be connected to Note that N is the maximum number of pages (the default number of pages) of electronic paper that can be bound in the folder at one time. Also, the page selector electrode 13 on the front side _N Sends a first page enable signal to the first page enable circuit 40, and the page selector electrode 23 on the back side _{N + 1} , A second page enable signal is sent to a second page enable circuit (not shown). Note that the second page enable circuit has the same configuration as the first page enable circuit 40. When the potential level of the first page enable signal is High, the first page enable circuit 40 is a transistor 41 as a component. ₁ ,... And the transistor 43 ₁ ,... Are turned on so that image data can be written to the image display unit on the front side, and the second page enable circuit is a component (not shown) when the potential level of the second page enable signal is High. By turning on a certain transistor, it becomes possible to write image data to the image display section on the back side.
[0035]
The page overflow detection circuit 30A has a source connected to the ground power supply, a drain connected to the page overflow electrode 21, and a gate connected to the page selector electrode 23. ₂ Is connected to an N-channel MOS transistor 32.
[0036]
Next, the operation of the electronic paper according to the present embodiment will be described with reference to FIGS.
[0037]
First, a method of checking the total number of pages when electronic paper is set in a folder and bound with a binder will be described with reference to FIG. FIG. 11 shows an example in which the maximum number of pages that can be bound in the binder is 10 pages. Since the electronic paper has two pages of the image display unit, the number of the electronic paper is five in this example. As in the case of the first embodiment, the electrodes that are electrically connected are given the same numbers. That is, in FIG. 11, the numbers D1 to D11 are given to the electrodes. Now, consider a case where the number of pages of electronic paper bound in the binder is equal to or less than a predetermined number of pages. When the potential level of the page selector electrode D1 on the front side of the first electronic paper is set to High and the potential levels of the other page selector electrodes D2 to D11 on the front side are set to Low by the controller of the electronic paper control apparatus, Only the potential level of the (total number of pages + 1) page selector electrode on the back side becomes High. Thus, as in the first embodiment, the controller can recognize the number of pages of the electronic paper bound to the binder at the position of the page selector electrode at which the potential level becomes High.
[0038]
When the electronic paper is bound so that the number of pages exceeds the predetermined number of pages, the controller can recognize it. This will be described with reference to FIG. When the potential level of the page selector electrode D1 on the front side (first page) of the first electronic paper is set to High and the other page selector electrodes are set to Low, if the number of pages is within the predetermined number of pages, the total number of pages can be determined as described above. However, when the number of pages exceeds a predetermined number, the potential level of the page overflow electrode 21 becomes Low. For example, in FIG. 12, the default page number is 10 pages, but if the pages are bound to the binder in 11 or more pages, the back of the 11th page, that is, the second page selector electrode D1 of the 12th page (23 in FIG. ₂ ) Goes high, and the potential level of the page overflow electrode 21 goes low.
[0039]
Next, a method of selecting a write page will be described with reference to FIG. To select a page to be written, it is necessary to set the potential level of the corresponding page selector electrode to High. An image writing controller built in the folder, by setting the potential level of the page selector electrode calculated by “(total number of pages) − (writing page number) +1” to High, thereby writing only the page. Can be. For example, as shown in FIG. 15, when the fifth page and the sixth page are to be rewritten with the same content, the calculation of “(total number of pages) − (write page number) +1” results in 6 and 5, and The potential levels of the fifth and sixth page selector electrodes D5 and D6 of one page are set to High. Then, the level of the page enable signal output from the electrodes D5 and D6 of the fifth page and the sixth page becomes High, and the data of the row and the column are written in the fifth page and the sixth page (see FIG. 13).
[0040]
As described above, the electronic paper of the present embodiment can also obtain the same effects as those of the first embodiment. That is, it is possible to use a plurality of the same electronic papers and to write an image only on the page desired to be rewritten, or to write the image on the electronic paper of a plurality of selected pages at a time. After writing, it can be removed from the folder and handled like printed paper. Furthermore, since the electronic paper of the present embodiment has exactly the same circuit in each page, the pages in the folder can be freely replaced, added, or extracted.
[0041]
When writing images or character information, the pages can be bound in a dedicated folder, and when viewed, each page can be freely removed and used. When the removed pages are bound in a folder, the pages are automatically determined in that order, so that the user can use the electronic paper without worrying about the order.
[0042]
(Fourth embodiment)
In the electronic paper of the third embodiment, the image display unit is a simple matrix type, but may be an active matrix type. An active matrix type will be described as a fourth embodiment of the present invention.
[0043]
FIG. 14 shows the configuration of the electronic paper according to the fourth embodiment of the present invention. The electronic paper according to the fourth embodiment has a pixel display unit of an active matrix type, and is provided in the electronic paper according to the third embodiment shown in FIG. And power supply electrodes 14 and 24 are newly provided. The power supply electrode 14 is provided on the front side of the electronic paper, the power supply electrode 24 is provided on the back side, is commonly connected, and is further connected to a driving power supply. The selection transistor 8 has a drain connected to the row electrode 2 of each pixel 6, a source connected to the power supply electrode 24, and a gate connected to the transistor 41 for selecting the row of the pixel. _i (I = 1,...).
[0044]
The electronic paper of the fourth embodiment can also obtain the same effects as those of the third embodiment. That is, it is possible to use a plurality of the same electronic papers and to write an image only on the page desired to be rewritten, or to write the image on the electronic paper of a plurality of selected pages at a time. After writing, it can be removed from the folder and handled like printed paper. Furthermore, since the electronic paper of the present embodiment has exactly the same circuit in each page, the pages in the folder can be freely replaced, added, or extracted.
[0045]
In the first to fourth embodiments, the pixel 6 is a microcapsule electrophoresis type, but a twist ball type, a dichroic dye / liquid crystal type, a liquid crystal / organic photoreceptor composite film type, a toner type, etc. It goes without saying that the image may be formed by a charge pattern perpendicular to the film surface.
[0046]
【The invention's effect】
As described above, according to the present invention, even when a plurality of sheets are overlapped, an image or a character can be written to each.
[Brief description of the drawings]
FIG. 1 is a view showing a configuration of an electronic paper according to a first embodiment of the present invention.
FIG. 2 is a view for explaining a method of checking a total number of sheets of electronic paper according to the first embodiment when the electronic paper is bound to a binder of the electronic paper control device.
FIG. 3 is an exemplary view for explaining a method of detecting that the electronic paper of the first embodiment is bound to a binder of the electronic paper control device in excess of a predetermined number.
FIG. 4 is an exemplary view for explaining a method of selecting a writing page when a plurality of electronic papers of the first embodiment are bound to a binder of the electronic paper control device.
FIG. 5 illustrates a specific example of a pixel of electronic paper.
FIG. 6 is a diagram showing a specific example of an electronic paper control device according to the present invention.
FIG. 7 is an enlarged view of a part of the electronic paper control device.
FIG. 8 is a perspective view showing the configuration of the electronic paper control device when the electronic paper is bound.
FIG. 9 is a view showing a configuration of electronic paper according to a second embodiment of the present invention.
FIG. 10 is a diagram showing a configuration of an electronic paper according to a third embodiment of the present invention.
FIG. 11 is an exemplary view for explaining a method of checking the total number of sheets of electronic paper according to the third embodiment when the electronic paper is bound to a binder of the electronic paper control device.
FIG. 12 is a view for explaining a method of detecting that the electronic paper of the third embodiment has been bound to a binder of the electronic paper control device in excess of a predetermined number.
FIG. 13 is a view for explaining a method of selecting a writing page when a plurality of electronic papers of the third embodiment are bound to a binder of the electronic paper control device.
FIG. 14 is a view showing a configuration of electronic paper according to a fourth embodiment of the present invention.
[Explanation of symbols]
2 Row electrode
4 Column electrode
6 pixels
8 Selection transistor
11, 21 Page overflow electrode
Thirteen _i , 23 _i (I = 1,..., N + 1) Page selector electrode
Fifteen _i , 25 _i (I = 1,...) Row selector electrode
17 _i , 27 _i (I = 1, ...) Column selector electrode
30 Page overflow detection circuit
31 N-channel MOS transistor
40 page enable circuit
41 _i (I = 1,...) N-channel MOS transistor
43 _i (I = 1,...) N-channel MOS transistor
110 Row Selector Circuit
120 column selector circuit

Claims (7)

A plurality of row electrodes, a plurality of column electrodes arranged so as to intersect with the plurality of row electrodes, and a charge pattern of the corresponding row electrode and column electrode provided at each intersection of the row electrode and the column electrode. An image display unit having a pixel that displays an image based on
A plurality of row selector electrodes respectively provided on the front side and the back side for the plurality of row electrodes,
A plurality of column selector electrodes respectively provided on the front side and the back side for the plurality of column electrodes,
First to (N + 1) th (N ≧ 2) page selector electrodes provided at corresponding positions on the front side and the back side, respectively;
A first page enable circuit for simultaneously turning on or off the connection between the row electrode and the corresponding row selector electrode and the connection between the column electrode and the corresponding column selector electrode based on a first page enable signal;
When k is an integer of 1 or more and N or less, the i-th (i = 1,..., N−k + 1) page selector electrode on the front side is electrically connected to the (i + k) -th page selector electrode on the back side. The i-th (i = N−k + 2,..., N + 1) page selector electrode on the front side is electrically connected to the (i−N + k−1) -th page selector electrode on the back side. The first page enable signal is output from the Nth page selector electrode of the electronic paper, and each of the electrodes is such that each electrode on the back side of an electronic paper when a plurality of sheets are stapled is opposed to this back side. Electronic paper characterized by being arranged so as to be electrically connected to a corresponding electrode on the front side of electronic paper different from electronic paper. 2. The electronic paper according to claim 1, further comprising a page overflow detection circuit that detects a page overflow based on a potential level of the (N + 1) th page selector electrode on the front side. A drain is connected to a driving power supply, a source is connected to a row electrode of a corresponding pixel, and a gate is connected to a corresponding row selector electrode via the first page enable circuit. 3. The electronic paper according to claim 1, further comprising a selection transistor. The k is an integer of 2 or more, and the image display unit is provided on each of the front side and the back side, and the first page enable circuit is configured to display the image on the front side based on the first page enable signal. The connection between the row electrode of the section and the corresponding row selector electrode and the connection between the column electrode and the corresponding column selector electrode of the image display section on the front side are simultaneously turned ON or OFF, and the N + 1-kth page on the front side The potential level of the selector electrode is used as a second page enable signal. Based on the second page enable signal, connection between the row electrode of the back image display unit and a corresponding row selector electrode and display of the back image are performed. A second page enable circuit for simultaneously turning on or off the connection between the column electrode of the section and the corresponding column selector electrode. The electronic paper according to claim 1 or 2, characterized in that provided in. A drain is connected to a driving power supply, a source is connected to a row electrode of a corresponding pixel, and a gate is connected to a corresponding row selector electrode via the first and second page enable circuits. 5. The electronic paper according to claim 4, further comprising a selection transistor connected to the electronic paper. 4. The electronic paper according to claim 1, wherein the image display unit is a simple matrix type. A pair of binders capable of binding the electronic paper according to any one of claims 1 to 6, wherein each of the binders has an electrode at a position corresponding to a position where each electrode of the electronic paper is provided. The electronic paper control device according to claim 1, wherein each of the electrodes is electrically connected to a corresponding electrode of the electronic paper in contact with the binder when the electronic paper is bound.

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