JP2011150119A - Entry information display device - Google Patents

Abstract

An object of the present invention is to reduce the time from entry to display of information in the case of displaying information by charging particles moving between two electrodes arranged opposite to each other.
In a region within a radius a from a point facing a contact point on a touch panel unit, charging particles that have been attracted to the transparent electrode are attracted to the display electrode, thereby the display electrode and the transparent electrode are attracted. When the contact point is detected by the touch panel unit 50 in that region, the display electrode 11 and the display electrode 11 arranged at the contact point are A sufficient voltage is applied so that the chargeable particles 33 that are not attracted to any of the transparent electrodes 21 are completely attracted to the display electrode 11 side.
[Selection] Figure 1

Description

  The present invention relates to an entry information display device for displaying entered information, and in particular, the time from entry to display of information in the case of displaying information by moving charged particles between two electrodes arranged opposite to each other. It is related with technology to shorten.

  In recent years, electronic books that can store and display contents published in books, newspapers, and the like as contents have been sold. As such an electronic book, for example, there is an electronic book that displays information using an organic EL element. Since the information can be variably displayed while being thin, further spread in the future is expected (for example, , See Patent Document 1). As such an electronic book, an organic EL element is not used, but an electrophoretic display method in which information is displayed by moving a chargeable particle between two electrodes arranged opposite to each other is considered. The electrophoretic display method can maintain the display state even after the power is turned off, and thus is superior in terms of power consumption compared to the one using an organic EL element.

  In recent years, in the electronic book as described above, it has been considered that not only information can be displayed but also information can be written so that a memo can be written in the displayed content. In order to enable entry of information in an electronic book, a touch panel unit for detecting a contact region is laminated on an information display layer for performing electrophoretic display as described above, and a region where contact is detected by the touch panel unit Information applied with a pen or the like can be displayed by applying a voltage for displaying information on the information display layer to the electrode facing the electrode.

JP 2010-2920 A

  In the case of using the electrophoretic display method as described above, information is displayed by moving the chargeable particles between the two electrodes arranged opposite to each other according to the voltage applied to the electrodes. Since it takes time for the charged particles to move between the two electrodes, there is a time lag between entering information with a pen or the like and displaying the information, so that the operator enters the information. There is a problem that it is difficult to balance the information to be written because it is not known whether the information is recognized at the time and the writing locus is not immediately displayed.

  The present invention has been made in view of the problems of the conventional techniques as described above, and displays information by moving chargeable particles between two electrodes arranged opposite to each other. An object of the present invention is to provide an entry information display device capable of shortening the time from entry to display.

In order to achieve the above object, the present invention provides:
An entry information display device for displaying entry information,
A first electrode layer comprising a plurality of electrodes; and a second electrode layer disposed opposite to the first electrode layer, wherein one of the first and second voltages is applied to the plurality of electrodes. When selectively applied, the first voltage is applied by attracting the chargeable particles to one of the first electrode layer and the second electrode layer according to the voltage. An information display layer displaying different colors in a region facing the electrode and a region facing the electrode to which the second voltage is applied;
A touch panel unit that is laminated on the information display layer so that the color displayed in the information display layer can be seen through, and detects a contact point on the surface;
Of the plurality of electrodes, a region not displaying a color for displaying the entry information in a region within a predetermined range from a point facing the contact point detected by the touch panel portion of the information display layer A pre-drive process in which a voltage is applied to the electrode disposed on the electrode so that the chargeable particles are not attracted to any of the first and second electrode layers in a region facing the electrode. And a voltage for displaying a color for displaying the entry information is applied to an electrode disposed at a point opposite to the contact point detected by the touch panel unit in the area where the pre-drive process has been performed. In addition, the pre-drive process displays the display state of the region on the electrode disposed in the region outside the region of the predetermined range from the point facing the contact point detected by the touch panel unit. And a display control means for performing actual driving process and for applying a voltage for returning to the display state immediately before is performed.

  In the present invention configured as described above, when a pen or the like is brought into contact with the touch panel unit in order to enter information, first, a pre-drive process is performed in the display control means. In the pre-drive process, among the plurality of electrodes constituting the first electrode layer, entry information is displayed in an area within a predetermined range from a point facing the contact point detected by the touch panel portion of the information display layer. In order to make the state that the chargeable particles are not attracted to any of the first and second electrode layers in the region opposite to the electrode arranged in the region where the color for displaying is not displayed Is applied. Since the color for displaying the entry information is not displayed in the area, the chargeable particle has a color for displaying the entry information in the area of the first and second electrode layers. Although it is attracted to the electrode layer side that is not displayed, this pre-drive treatment causes the chargeable particles to have a color for displaying the entry information in the region of the first and second electrode layers. It is in a state of starting to be drawn toward the electrode layer side to be displayed. Thereafter, an actual drive process is performed in the display control means. In the actual drive process, after pre-drive process, for the area where the pre-drive process is performed, the color for displaying the entry information on the electrode arranged at the point facing the contact point detected by the touch panel unit Is applied to the electrode, and the display state of the region is pre-drive processed on the electrode disposed in the region outside the predetermined region from the point facing the contact point detected by the touch panel unit. A voltage for returning to the display state immediately before the operation is performed is applied. In the region where the pre-drive process has been performed, the chargeable particles are attracted to the electrode layer side that displays the color for displaying the entry information in the first and second electrode layers. Therefore, when a voltage for displaying a color for displaying the written information is applied to the electrode facing the area, the moving distance of the charged particles is shortened, and the voltage is thereby reduced. This shortens the time from when the is applied until the entry information is displayed.

  As described above, in the present invention, when a pen or the like is brought into contact with the touch panel unit to enter information, first, of the plurality of electrodes, the contact point detected by the touch panel unit of the information display layer is opposed. In the region within a predetermined range from the point, the chargeable particles are arranged in the region facing the electrode in the region not displaying the color for displaying the entry information. Perform a pre-drive process to apply a voltage to make it not attracted to any of the electrode layers, and then, for the area that has been subjected to the pre-drive process, at the point facing the contact point detected by the touch panel unit A voltage that displays a color for displaying entry information is applied to the arranged electrodes, and the area that is outside the predetermined range from the point facing the contact point detected by the touch panel unit. The electrode is arranged to perform the actual drive process for applying a voltage for returning the display state of the area to the display state immediately before the pre-drive process is performed. In the region where the contact point is detected, in the pre-drive process, the charged particles display the color for displaying the entry information in the region of the first and second electrode layers. Since it is in a state that has started to be attracted to the layer side, when a voltage displaying a color for displaying entry information is applied to the electrode facing the region, the moving distance of the charged particles is shortened, The time from entry to display of information can be shortened.

It is a figure which shows one Embodiment of the entry information display apparatus of this invention, (a) is a figure which shows the whole lamination | stacking state, (b) is the A section enlarged view shown to (a), (c) is ( It is a functional block diagram which shows the structure of the display control board shown to a). It is a figure for demonstrating operation | movement of the variable display part shown in FIG. 3 is a flowchart for explaining the operation of the entry information display device shown in FIG. 1. It is sectional drawing which shows the state of the surface when entry information is displayed with the entry information display apparatus shown in FIG. 1, and its state. It is a figure for demonstrating the relationship between the application time of the voltage with respect to the display electrode shown in FIG. 1, and the display color in a variable display part, (a) is the application time and display when a positive voltage is applied to a display electrode. A graph showing the relationship with color, (b) is a waveform diagram when a positive voltage is applied to the display electrode for a certain time, and (c) is a display electrode showing the charged particles attracted to the transparent electrode side. It is a wave form diagram in the case of applying a plus voltage for a sufficient time to be attracted to the electrode side. It is a figure for demonstrating the operation | movement at the time of entering information from the state by which the information is previously displayed with the entry information display apparatus shown in FIG.

  Embodiments of the present invention will be described below with reference to the drawings.

  1A and 1B are diagrams showing an embodiment of an entry information display device according to the present invention, in which FIG. 1A is a diagram showing an entire stacked state, FIG. 1B is an enlarged view of a portion A shown in FIG. c) is a functional block diagram showing the configuration of the display control board 60 shown in FIG.

  In this embodiment, as shown in FIG. 1, a display device electrode substrate 10 in which a plurality of display electrodes 11 constituting a first electrode layer are formed on a base substrate 12, and a transparent substrate made of glass, a transparent film, or the like. The information display layer 40 is configured such that the variable display unit 30 is sandwiched between the transparent conductive film substrate 20 in which a transparent electrode (for example, ITO) 21 that is a second electrode layer is formed on one surface of 22. A touch panel unit 50 is stacked on one surface of the display panel, and a display control board 60 serving as a display control unit is stacked on the opposite side of the touch panel unit 50. That is, in the information display layer 40, the display electrode 11 that constitutes the first electrode layer and the transparent electrode 21 that is the second electrode layer are arranged to face each other with the variable display portion 30 interposed therebetween.

  The display electrode 11 is formed in a matrix on the base substrate 12, and is controlled by the display control board 60, either a positive voltage that becomes the first voltage or a negative voltage that becomes the second voltage. Is selectively applied.

  As shown in FIG. 1B, the variable display unit 30 is configured such that the partition wall liquid 32 in which the chargeable particles 33 are dispersed is accommodated in a region surrounded by the partition wall 31 and the seal layer 34. The display device electrode substrate 10, the variable display unit 30, and the transparent conductive film substrate 20 are liquids in the partition wall in which the transparent electrode 21 and the display electrode 11 are accommodated in a region surrounded by the partition wall 31 and the seal layer 34. 32 so as to oppose each other. The partition wall 31 includes a bottom portion, a side portion that is an outer peripheral portion of the variable display portion 30, and a wall portion that divides the region surrounded by the side portion into a plurality of regions, for example, 130 μm □. The surface on the opposite side is open. And it laminates | stacks so that the bottom part side may oppose the electrode substrate 10 for display apparatuses, and the seal layer 34 is laminated | stacked on the opened side. In the example shown in FIG. 1, for the sake of simplicity, the partitioned area of the variable display unit 30 and the display electrode 11 correspond to each other on a one-to-one basis. It is not limited to what you have.

  The touch panel unit 50 is made of a transparent material so that the color displayed on the variable display unit 30 can be seen through, and a touch point on the surface can be detected by a known technique. .

  As shown in FIG. 1C, the display control board 60 detects the coordinates detected as contact points on the touch panel 50 and the electrode controller 61 that applies a voltage to the display electrode 11 and the transparent electrode 21. A unit 62 and a memory 63 for storing a voltage application state with respect to the display electrode 11 are provided.

  Below, operation | movement of the variable display part 30 mentioned above is demonstrated.

  FIG. 2 is a diagram for explaining the operation of the variable display unit 30 shown in FIG.

  In the variable display unit 30 shown in FIG. 1, information is displayed according to the voltage applied to the display electrode 11.

  In the variable display unit 30 shown in FIG. 2, the transparent electrode 21 is set to the GND potential by the control of the electrode control unit 61, and a negative voltage is applied to the display electrode 11 on the left side in the drawing, and the display electrode on the right side in the drawing is shown. 11 is applied with a positive voltage.

  Then, since the partition wall liquid 32 accommodated in the region surrounded by the partition wall 31 and the seal layer 34 is made of a dielectric material, and the chargeable particles 33 are charged to a negative potential, the chargeable particles 33. Moves inside the partition wall liquid 32 by Coulomb force, and as shown in FIG. 2, in the region where the display electrode 11 to which a negative voltage is applied is formed, the chargeable particles 33 are attracted to the transparent electrode 21 side, In the region where the display electrode 11 to which a positive voltage is applied is formed, the chargeable particles 33 are attracted to the display electrode 11 side.

  The partition liquid 32 is colored with a black dye or pigment, and the chargeable particles 33 contain a light scattering component having a high refractive index. Therefore, when the entry information display device is viewed from the transparent conductive film substrate 20 side. The area facing the display electrode 11 on the left side in the figure appears white, and the area facing the display electrode 11 on the right side in the figure appears black.

  Below, operation | movement of the above-mentioned entry information display apparatus is demonstrated.

  FIG. 3 is a flowchart for explaining the operation of the entry information display device shown in FIG. FIG. 4 is a sectional view showing the state of the surface and the state when the entry information is displayed by the entry information display device shown in FIG.

  As an initial state, in the entry information display device shown in FIG. 1, the transparent electrode 21 is set to the GND potential and a negative voltage is applied to all the display electrodes 11 under the control of the electrode control unit 61. As a result, as shown in FIG. 4B, the chargeable particles 33 are attracted toward the transparent electrode 21 in the region facing all the display electrodes 11 of the variable display unit 30, and the state shown in FIG. As shown, all areas on the touch panel unit 50 are displayed in white.

  In this state, when the tip of the touch pen 70 is brought into contact with the information writing area on the touch panel unit 50 in order to enter information using the touch pen 70, the touch point is detected by the touch panel unit 50 (step). S1).

  Then, in the coordinate detection unit 62, the coordinates of the contact point detected by the touch panel unit 50 are detected, and the display arranged to face the contact point based on the detected coordinate under the control of the electrode control unit 61. The electrode 11 is recognized, and a positive voltage is applied to the display electrode 11 disposed within a predetermined range within the radius a from the point facing the contact point (step S2). Then, in a region facing the display electrode 11 to which a positive voltage is applied, the chargeable particles 33 attracted to the transparent electrode 21 side are attracted to the display electrode 11 side. As will be described later, the radius a can be arbitrarily set so that the time from when information is entered with the touch pen 70 until the information is displayed does not exceed a predetermined time.

  After a certain period of time has elapsed since the plus voltage was applied to the display electrode 11 (step S3), the display electrode 11 to which the plus voltage was applied faces the contact point detected by the touch panel unit 50. The application of voltage to the display electrodes 11 other than the arranged display electrodes 11 is stopped (step S4).

  Then, the charging voltage 33 applied to the display electrode 11 disposed opposite to the contact point detected by the touch panel unit 50 is attracted to the transparent electrode 21 side. When a sufficient time has been reached for attracting, as shown in FIG. 4D, in a region facing the contact point detected by the touch panel unit 50, the charged particles 33 are attracted to the display electrode 11 side. In the region within the radius a from the contact point, the display electrode 11 and the transparent electrode 21 are not attracted. As a result, as shown in FIG. 4C, the contact point detected by the touch panel unit 50 is displayed in black, and the area within the radius a from the contact point is displayed in a gray color between black and white. The other areas are displayed in white.

  Here, the relationship between the voltage application time to the display electrode 11 and the display color in the variable display unit 30 will be described.

  FIG. 5 is a diagram for explaining the relationship between the voltage application time to the display electrode 11 shown in FIG. 1 and the display color in the variable display section 30, and (a) applies a positive voltage to the display electrode 11. (B) is a waveform diagram in the case where a positive voltage is applied to the display electrode 11 for a fixed time, and (c) is a waveform on the transparent electrode 21 side. FIG. 6 is a waveform diagram in the case where a positive voltage is applied for a sufficient time so that the charged particles 33 attracted to the display electrode 11 are attracted to the display electrode 11 side.

  As shown in FIG. 5A, the display color in the variable display unit 30 of the entry information display device shown in FIG. 1 changes with the voltage application time to the display electrode 11. Therefore, when a positive voltage is applied to the display electrode 11 in a state where the display color in the variable display unit 30 is white because the chargeable particles 33 are attracted to the transparent electrode 21 as described above, The charging particles 33 are attracted to the display electrode 11 side with the application time, and the display color in the variable display section 30 changes to black.

  At this time, it takes a certain amount of time for the chargeable particles 33 that have been attracted to either the display electrode 11 or the transparent electrode 21 to move in the partition wall liquid 32 and be attracted to the opposite side. By applying such a voltage to the display electrode 11 in small increments using a pulse, there is a difference in display change between a region changing from black display to white display and a region changing from white display to black display. Is avoided by the naked eye.

  Then, among the display electrodes 11 to which a positive voltage is applied, the display electrodes 11 other than the display electrodes 11 arranged to face the contact point detected by the touch panel unit 50 are shown in FIG. As shown in FIG. 6, after the positive voltage is applied, the chargeable particles 33 attracted to the transparent electrode 21 side are attracted to the display electrode 11 side and attracted to both the display electrode 11 and the transparent electrode 21. A positive voltage is applied as a pulse until a certain period of time until it is not in the state.

  Further, as shown in FIG. 5C, the display electrode 11 disposed opposite to the contact point detected by the touch panel unit 50 is applied with a positive voltage and then the transparent electrode 21 side. A positive voltage is applied as a pulse until a sufficient time has elapsed for the charged particles 33 attracted to the display electrode 11 to be attracted to the display electrode 11 side.

  As described above, in the electrode control unit 61 of the entry information display device illustrated in FIG. 1, the radius from the contact point detected by the touch panel unit 50 among the plurality of display electrodes 11 formed on the base substrate 12. The chargeable particles 33 attracted to the transparent electrode 21 side are attracted to the display electrode 11 side to the display electrode 11 disposed to face the region in a, and either the display electrode 11 or the transparent electrode 21 is attracted. However, a positive voltage is applied for a certain period of time until it is not attracted, and this processing in the display control board 60 is referred to as pre-drive processing. In the present embodiment, the chargeable particles 33 attracted to the transparent electrode 21 side are not attracted to either the display electrode 11 or the transparent electrode 21 by using the voltage application time with respect to the display electrode 11. In this state, the transparent electrode 33 is applied with a voltage lower than the voltage required for the chargeable particles 33 attracted to the transparent electrode 21 side to be completely attracted to the display electrode 11 side. It is also conceivable that the chargeable particles 33 attracted to the 21 side are not attracted to either the display electrode 11 or the transparent electrode 21. Including the above, in the pre-drive process, the plurality of display electrodes 11 formed on the base substrate 12 are arranged to face a region within the radius a from the contact point detected by the touch panel unit 50. A voltage is applied to the display electrode 11 so that the charged particles 33 attracted to the transparent electrode 21 side are not attracted to either the display electrode 11 or the transparent electrode 21.

  Thereafter, the touch panel portion 50 is applied to a region where the pre-drive process is performed, that is, a region which is grayed out because the chargeable particles 33 are not attracted to either the display electrode 11 or the transparent electrode 21. When the contact point is detected at (Step S5), the coordinate detection unit 62 detects the coordinate of the contact point, and the electrode control unit 61 controls the contact point based on the detected coordinate. The arranged display electrode 11 is recognized, and the display electrode 11 is sufficiently attracted to the display electrode 11 side so that the charged particles 33 that are not attracted to either the display electrode 11 or the transparent electrode 21 are attracted to the display electrode 11 side. A positive voltage is applied for a long time (step S6). Then, as shown in FIG. 4 (f), the chargeable particles 33 that are not attracted to either the display electrode 11 or the transparent electrode 21 are completely attracted to the display electrode 11 side, as shown in FIG. 4 (e). In addition, among the areas that are grayed out by the pre-drive process, the area that is subsequently touched with the touch pen 50 is displayed in black, and the entry information 83 by the touch pen 50 is displayed in black.

  As described above, in the region within the radius a from the contact point in the touch panel unit 50, the chargeable particles 33 that have been attracted to the transparent electrode 21 side are attracted to the display electrode 11 side to both the display electrode 11 and the transparent electrode 21. When the contact point is detected by the touch panel unit 50 in that region, the display electrode 11 and the transparent electrode 11 are transparent with respect to the display electrode 11 disposed facing the contact point. A sufficient positive voltage is applied so that the charged particles 33 that are not attracted to any of the electrodes 21 are completely attracted to the display electrode 11 side, so that the tip of the touch pen 70 is placed on the touch panel unit 50 to enter information. When the contact is made, the moving distance of the chargeable particles 33 is shortened, so that the time from entry of information to display can be shortened. That.

  In addition, the touch panel is subsequently applied to the area where the pre-drive process has been performed, that is, the area that is grayed out because the chargeable particles 33 are not attracted to either the display electrode 11 or the transparent electrode 21. In an area farther than the radius a from the contact point detected at 50, that is, an area outside the predetermined range based on the radius a (step S7), the electrode control unit 61 controls the area. A negative voltage is applied to the display electrode 11 (step S8). Then, as shown in FIG. 4 (f), the chargeable particles 33 that are not attracted to either the display electrode 11 or the transparent electrode 21 are attracted to the transparent electrode 21, and as shown in FIG. 4 (e), Of the areas that are grayed out by the pre-drive process, the display state of the areas that were not touched by the touch pen 50 thereafter is returned to the white display immediately before the gray display. In the display control board 60, since the voltage application state with respect to the display electrode 11 is stored in the memory 63, the electrode control unit 61 refers to the memory 63 and is arranged in the area where the pre-drive process is performed. Among the displayed electrodes 11, a pre-drive process is performed on the display state of the display electrode 11 arranged in a region away from the radius a from the contact point detected by the touch panel 50 after that. A voltage for returning to the previous display state is applied.

  As described above, in the electrode control unit 61 of the entry information display device shown in FIG. 1, when a contact point is detected by the touch panel unit 50 in the area where the pre-drive process has been performed, A voltage for displaying a black color on the variable display unit 30 is applied to the display electrodes 11 arranged opposite to each other, and an area farther than the radius a from the contact point detected by the touch panel 50, That is, a voltage is applied to the display electrode 11 disposed opposite to a region outside the predetermined range by the radius a to return the display state of the region to the display state immediately before the pre-drive process is performed. Thus, this process in the display control board 60 is referred to as an actual drive process.

  Even after the pre-drive process is performed, the pre-drive process with respect to the contact point of the touch panel unit 50 by the touch pen 70 is performed in the same manner as described above, and as a result, as shown in FIG. In the area within the radius a from the contact point of the touch panel unit 50, it is displayed in gray.

  In the embodiment described above, the case where information is entered using the touch pen 70 from a state where nothing is displayed on the entry information display device and only the entry information is displayed has been described as an example. Since the display layer 40 is capable of displaying information as described above, actually, a memo or the like for the information is entered in a state where the information is displayed in advance on the information display layer 40. .

  FIG. 6 is a diagram for explaining the operation when information is entered from the state in which information is displayed in advance in the entry information display device shown in FIG.

  As shown in FIG. 6, in the entry information display device shown in FIG. 1, a positive voltage is applied only to the display electrode 11 corresponding to the information to be displayed among the plurality of display electrodes 11 formed on the base substrate 12. The black display part 51 may be formed by applying. When the region within the radius a from the contact point detected by the touch panel unit 50 as described above covers the black display unit 51, the black display unit 51 is a contact point by the touch pen 70. Even if it exists, there is no need to change the display color. Therefore, in the electrode control unit 61, as shown in FIG. 6A, the display electrode 11 facing the black display unit 51 is a region within the radius a from the contact point detected by the touch panel unit 50. Even in the case where the pre-drive processing described above is not performed and gray display is performed, the above-described pre-drive processing is performed only for the region not displaying black for displaying the entry information, that is, only the region displaying white. Will be done.

  Then, by performing the actual drive process described above, as shown in FIG. 6B, the area touched by the touch pen 50 among the areas displayed in gray by the pre-drive process is displayed in black. Thus, the entry information 83 by the touch pen 50 is displayed in black.

DESCRIPTION OF SYMBOLS 10 Display device electrode substrate 11 Display electrode 12 Base base material 20 Transparent conductive film substrate 21 Transparent electrode 22 Transparent substrate 30 Variable display part 31 Partition 32 Partition liquid 33 Chargeable particle 34 Seal layer 40 Information display layer 50 Touch panel part 51 Black Display unit 60 Display control board 61 Electrode control unit 62 Coordinate detection unit 63 Memory 70 Touch pen 81 Contact point 82 Surrounding area 83 Entry information

Claims (1)

An entry information display device for displaying entry information,
A first electrode layer comprising a plurality of electrodes; and a second electrode layer disposed opposite to the first electrode layer, wherein one of the first and second voltages is applied to the plurality of electrodes. When selectively applied, the first voltage is applied by attracting the chargeable particles to one of the first electrode layer and the second electrode layer according to the voltage. An information display layer displaying different colors in a region facing the electrode and a region facing the electrode to which the second voltage is applied;
A touch panel unit that is laminated on the information display layer so that the color displayed in the information display layer can be seen through, and detects a contact point on the surface;
Of the plurality of electrodes, a region not displaying a color for displaying the entry information in a region within a predetermined range from a point facing the contact point detected by the touch panel portion of the information display layer A pre-drive process in which a voltage is applied to the electrode disposed on the electrode so that the chargeable particles are not attracted to any of the first and second electrode layers in a region facing the electrode. And a voltage for displaying a color for displaying the entry information is applied to an electrode disposed at a point opposite to the contact point detected by the touch panel unit in the area where the pre-drive process has been performed. In addition, the pre-drive process displays the display state of the region on the electrode disposed in the region outside the region of the predetermined range from the point facing the contact point detected by the touch panel unit. Entry information display apparatus and a display control means for performing the actual driving process for applying a voltage for returning to the display state immediately before is performed.

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