JP2018092418A - Program and display control device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce an operation load of a user to erase a temporary writing when the user performs the temporary writing more than permanent writing compared with a method requiring a user's explicit erase operation to erase writing to an electronic document.SOLUTION: A writing management unit 30 registers, when writing is input from a user to an electronic document displayed by a document display control unit 10, the writing in a writing table 32 as temporary writing in association with a time of the input. Then, in response to with passage of time from the input time, display density of the temporary writing held by the writing table 32 is gradually reduced, and the display density is set to 0 when a predetermined display period has passed. A write display control unit 24 combines the temporary writing in the writing table 32 with a corresponding display density with respect to an image of the electronic document. When the display period has passed, the density of the temporary writing becomes 0, and it is not displayed on a screen.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a program and a display control apparatus.

  Devices and software for browsing electronic documents (hereinafter referred to collectively as browsing devices) have become widespread. For example, an apparatus such as an electronic book terminal, or document viewer software that operates on a personal computer, a tablet terminal, a smartphone, or the like is an example. Many of these browsing devices have a function of accepting writing from a user and displaying the writing superimposed on an image of an electronic document. This type of browsing apparatus accepts one or more of markings such as underline, handwritten characters and figures, character strings by keyboard input, and the like as writing. Writing is also called annotation (annotation) on the original electronic document.

  For example, Patent Document 1 discloses an apparatus that allows a user to write a marker line on an electronic document.

  Japanese Patent Application Laid-Open No. 2004-228688 does not display writing on an electronic document, but discloses an apparatus for supporting browsing of an electronic document. This apparatus displays an electronic book document and a cursor that moves automatically or manually along the document arrangement on the book display unit. The cursor is indicated by an arrow or a side line like a mouse pointer, and it is applied to the character to specify the current reading position. For example, by moving at a fixed time interval, the line of sight is read when reading a document. Or guide in the row direction.

JP 2006-039783 A JP 2010-009104 A

  Analyzing user writing behavior on paper documents, user writing is not limited to what is desired to remain permanently in the document, but also for the purpose of understanding the contents of the document and comparing information in the document. It can be seen that there are some that will be used after the end of the purpose. For example, for the purpose of reading a foreign language document, there may be a case where a phrase or a section separator or a translation of a difficult phrase is written, but this writing is performed after the outline of the document is understood. Is often unnecessary. On the other hand, markings to emphasize important parts of the document, notes of ideas that you noticed while reading the document, etc. are intended to be referenced at another time after viewing the document, This is an example of a write that you want to keep permanently.

  If there is a permanent writing in the document that is sufficient if it can be used temporarily, the more important writing that you want to keep permanently becomes confused and becomes relatively inconspicuous.

  In the conventional browsing device, writing is permanent, and it is necessary to explicitly perform an erasing operation to erase the writing. When a user writes a temporary writing on an electronic document, the writing that he wants to leave permanently without deleting the temporary writing is allowed to be inconspicuous or However, it is necessary to deal with whether to perform an erasing operation one by one.

  The present invention is for temporary writing erasure when a user performs more temporary writing than permanent writing, as compared with a method that requires an explicit erasing operation of the user to erase writing to an electronic document. The purpose is to reduce the operational burden on the user.

  The invention according to claim 1 is a storage means for storing a writing to an electronic document, and a generating means for generating a display image for displaying the electronic document together with the writing, wherein a predetermined erasing condition is set for the writing Is a program for functioning as a generation unit that generates the display image that does not include the writing.

  The invention according to claim 2 further includes means for changing the writing to permanent writing when a permanent operation targeting the writing stored in the storage means is received from a user, The program according to claim 1, wherein the generation unit includes the permanent writing in the display image even when the erasing condition is satisfied.

  The invention according to claim 3 is characterized in that the generation means has a display mode in which the permanent writing in the display image can be distinguished from the writing that is not changed to the permanent writing. 2. The program described in 2.

  According to a fourth aspect of the present invention, the storage unit stores an input time when the writing is input to the electronic document in association with the writing, and the erasure condition is predetermined from the input time. The program according to any one of claims 1 to 3, wherein a display period has elapsed.

  According to a fifth aspect of the invention, in the program according to the fourth aspect, the generation unit attenuates the display density of the writing included in the display image as the input time elapses.

  According to a sixth aspect of the present invention, the generation means makes the degree of attenuation of the display density at the first time point immediately after the input time larger than the degree of attenuation at the second time point after the first time point. The program according to claim 5.

  The invention according to claim 7 further includes means for reducing the speed of attenuation of the display density of the writing when a specific operation for the writing is received from a user. It is a program.

  The invention according to claim 8 further comprises means for extending the display period corresponding to the writing when a display extending operation for the writing is received from a user. The program described in the section.

  In the invention according to claim 9, the storage means further stores the page of the electronic document to be written in association with the writing, and the generation means displays the display image on the screen. The program according to any one of claims 4 to 8, characterized in that the progress of the display period is temporarily stopped for the writing intended for a page different from the existing page.

  According to a tenth aspect of the present invention, there is provided storage means for storing writing to an electronic document and generation means for generating a display image for displaying the electronic document together with the writing, wherein a predetermined erasing condition is satisfied for the writing. If so, the display control device includes a generation unit that generates the display image that does not include the writing.

  According to the invention according to claim 1 or 10, in the case where the user performs more temporary writing than permanent writing compared to the method that requires the user's explicit erasing operation to erase writing to the electronic document. It is possible to reduce a user's operation burden for temporarily erasing writing.

  According to the second aspect of the invention, the user can designate writing that does not require erasure.

  According to the third aspect of the invention, it is possible to visually distinguish writing that is erased when the erasing condition is satisfied and permanent writing that is not erased even when the erasing condition is satisfied.

  According to the fourth aspect of the present invention, writing can be erased after a lapse of time.

  According to the fifth aspect of the present invention, it is possible to intuitively notify the user that the writing will be erased by density attenuation.

  According to the sixth aspect of the present invention, it is easy for the user to recognize that the writing density is attenuated immediately after the writing is input, as compared with the case where the density attenuation is constant.

  According to the invention which concerns on Claim 7, the display period of writing can be extended according to a user's hope.

  According to the invention which concerns on Claim 8, the display period of writing can be extended according to a user's hope.

  According to the invention of claim 9, after browsing a page different from the page on which the user has written, compared to the case where the display time is uniformly advanced regardless of which page the user is browsing , It is possible to reduce the possibility that the writing is erased when returning to the original viewing of the page.

It is a figure which shows the example of a functional structure of the apparatus of embodiment. It is a figure which shows the example of a temporary write management table. It is a figure which shows the example of the density attenuation process of temporary writing by a write management part. It is a figure which shows the example of a process of a tap reception part. It is a figure which shows the example of the attenuation pattern of the density of temporary writing. It is a figure which shows the example of the attenuation | damping pattern attenuate | damped strongly by the initial stage of writing.

  An embodiment of an electronic document browsing apparatus will be described with reference to FIG. This browsing device is constructed by causing a computer terminal having a display device and an input device to execute a program representing the function of a module group described below. In the example of FIG. 1, a terminal having a touch panel display such as a tablet terminal is assumed as a computer terminal that executes the program.

  In this embodiment, the user's writing to the electronic document is, in principle, a writing that should be erased after use, and is temporarily written (that is, after a certain erasing condition such as the passage of a certain time is satisfied) It is treated as writing that disappears). The erasing conditions here include an explicit / direct erasing operation for temporary writing by the user (for example, selecting the writing in the electronic document displayed on the touch panel by a tap operation, etc., and an operation menu for the selected writing. The operation of selecting “erase (delete)” from the above) is not included. The erasing condition is, for example, an attribute that changes with the passage of time of writing (for example, the elapsed time from the aging when the writing is input, or the number of times the writing destination electronic document is closed after the writing is performed) ) Is a condition to be satisfied. For example, the browsing device gradually attenuates the display density of the temporary writing so that it disappears completely (the density becomes 0) after a predetermined time. On the other hand, for writing that the user wants to leave permanently, the user is asked to perform an explicit persistence operation. When a predetermined operation indicating persistence is performed on the writing, the browsing device stores the writing as permanent writing (that is, writing that is displayed without being erased even if the erasure condition for temporary writing is satisfied). And always display.

  The browsing apparatus shown in FIG. 1 includes a document display control unit 10, a writing UI (user interface) unit 20, and a writing management unit 30.

  The document display control unit 10 executes display control for displaying an electronic document on the screen of the display device. The display control includes general control such as displaying an electronic document on a screen for each page (or every predetermined number of pages such as every two pages), and control for switching a page displayed on the screen in response to a page turning operation. Document display control is included. This display control may be the same as the control performed by a PDF viewer application that displays a document in a general PDF (Portable Document Format) format.

  The writing UI unit 20 executes user interface processing for writing on the electronic document displayed on the screen of the display device by the display control of the document display control unit 10. The writing UI unit 20 includes a writing receiving unit 22, a writing display control unit 24, and a tap receiving unit 26.

  The writing accepting unit 22 accepts an input of writing for the electronic document displayed on the screen from the user. The input of writing is performed on the screen of the touch panel display which is a display device, for example, by handwriting input with a user's finger or a pen tip. The writing reception unit 22 receives information on handwritten strokes by the user's pen tip or the like from the OS (operating system) of the computer terminal as writing information, and passes it to the writing management unit 30. When the write management unit 30 receives the write information from the write receiving unit 22, the write management unit 30 registers the information in a write table (described later).

  The writing display control unit 24 performs display control for displaying the page written in the electronic document displayed by the document display control unit 10 in a superimposed manner. This writing display control is performed with reference to the writing table of the writing management unit 30 (details will be described later).

  The tap accepting unit 26 accepts a user tap operation (an operation of tapping with a fingertip or a pen tip) on the page of the electronic document displayed by the document display control unit 10, and changes the writing state according to the accepted tap operation. Control such as changing. In this embodiment, when writing is written, the writing is handled as temporary writing. However, when the user wants to change the writing to permanent writing, a predetermined tap operation (for example, for the writing) Double tap). Further, the tap receiving unit 26 may perform processing for extending the display time of the writing in response to another tap operation for writing.

  The writing management unit 30 holds a writing table 32 for managing user writing on the electronic book. Then, the state of each writing registered in the writing table 32 is updated according to the passage of time or the operation from the user.

  One writing table 32 is created for each electronic document. The writing management unit 30 holds and manages the writing table 32 of the electronic document displayed by the document display control unit 10.

  FIG. 2 shows an example of the write table. An entry for each writing in the writing table (one row in the table) includes “ID”, “Time”, “Page”, “Stroke”, “Permanent”, “Attenuation coefficient”, “Density”, etc. Contains items.

  “ID” is identification information of the writing.

  “Time” is the time when the writing was performed. In the example shown in the figure, the “time” of writing indicates the elapsed time from a certain reference time to the writing time in seconds.

  “Page” is the number of the page on which the writing is performed.

  “Stroke” is information indicating the stroke of writing, and is a point sequence indicating the trajectory of the pen tip or the like on the screen at the time of writing. Each point of this point sequence is represented by absolute coordinates within the page (for example, (x, y) coordinates with a specific vertex of the rectangle of the page as the origin). By sampling the absolute coordinates in a page such as a pen tip touching the touch panel every unit time (for example, about 1 millisecond), such point sequence (stroke) information is generated.

  “Permanent” is a flag indicating whether or not the writing is permanent writing. In this example, when the value of the “permanent” flag is “1”, the writing is permanent writing, and when it is “0”, it is temporary writing.

  The “attenuation coefficient” is a coefficient that defines the attenuation rate of the display density for temporary writing. In this example, the density of the temporarily written display becomes thinner at a constant speed indicated by the attenuation coefficient as time passes. The numerical value “3.3 (%)” of the attenuation coefficient illustrated in the figure is such that the initial value of the writing density is set to the maximum density of 100% and disappears completely in 5 minutes after the writing is performed (that is, the density = 0%). In this case, the amount of attenuation of the density per 10 seconds.

  “Density” is the current density of the writing.

  The specific numerical values given in FIG. 2 are merely examples.

  When the writing reception unit 22 receives writing from the user, the writing reception time (for example, writing start time), information on the page on which writing has been performed, writing stroke information, and the like are written as writing information. Tell the management unit 30. When the write management unit 30 receives the write information from the write reception unit 22, the write management unit 30 adds an entry for the write to the write table 32. For the entry, information such as the time notified from the write acceptance unit 22, the page of the write destination, and the stroke is registered. Further, the value of the “permanent” flag is set to 0 (temporary writing), the value of the attenuation coefficient is set to a predetermined value (3.3 in the example of FIG. 2), and the density value is set to a predetermined initial value (FIG. In the example shown, it is set to 100). Of these, the concentration decreases with the passage of time.

  When the electronic document displayed so far is closed by a user operation on the document display control unit 10, the writing management unit 30 associates the writing table with the document ID (identification information) of the electronic document and stores it in a nonvolatile manner. It may be stored in the device. At this time, an entry whose “permanent” flag is 0 (that is, temporary writing) may be deleted. When the closed electronic document is opened again by the document display control unit 10, a writing table corresponding to the electronic document is read from the nonvolatile storage device and held in the writing management unit 30.

  Next, an example of temporary write density attenuation processing by the write management unit 30 will be described with reference to FIG. The write management unit 30 executes the procedure of FIG. 3 every unit time (for example, 10 seconds when the attenuation coefficient of the table illustrated in FIG. 2 is used).

  In the procedure of FIG. 3, the write management unit 30 first determines whether there is an unprocessed entry in the write table 32 (S10). If the result of this determination is No, the process is terminated.

  When the determination result in S10 is Yes, the write management unit 30 acquires one unprocessed entry from the write table 32 (S12). Then, it is determined whether or not the value of the “permanent” flag of the entry is 1 (S14). When the determination result is Yes, the writing corresponding to the entry is a permanent writing, so the processing is terminated without performing the density attenuation for the entry, and the process returns to S10.

  If the determination result in S14 is No, the write corresponding to the entry is a temporary write, so the write management unit 30 attenuates the write density. That is, the “density” value W of the entry is acquired (S16), the “attenuation coefficient” value D is acquired (S18), and the value of WD is calculated. Then, the value of “density” of the entry is rewritten to WD (S19) (because the density coefficient is the amount of density attenuation per unit time).

  The writing display control unit 24 acquires the latest information of the writing table 32 at each regular display update timing, and writes each writing according to the information, the image of the page of the electronic document to be displayed generated by the document display control unit 10. To synthesize. That is, the writing display control unit 24 combines the writing with the image of the page at the maximum density, regardless of the “density” value of the entry, for the writing of the entry whose “persistent” flag value is 1. In addition, regarding the writing of an entry whose “permanent” flag value is 0, the entry is combined with the image of the page with the “density” value of the entry. In this composition, for example, when the writing density is 6%, the writing transparency may be set to 94% and the writing may be drawn on the image of the page.

  Next, an example of processing contents of the tap receiving unit 26 will be described with reference to FIG.

  When a tap operation is performed from the user to the touch panel, the tap receiving unit 26 acquires information on the position and type of the tap (for example, from an operating system) (S20). The position of the tap acquired individually is an absolute coordinate within the page of the electronic document displayed on the touch panel by the document display control unit 10, and the type of tap is a single tap (the operation of tapping the screen once) ), Double tap (light tapping the screen twice in succession), triple tap, etc.

  Next, the tap receiving unit 26 determines whether or not there is temporary writing at the tap position acquired in S20 (S22). That is, a search is made for a stroke that passes through the tap position from among the strokes of writing whose “permanent” flag is 0 in the writing table 32. If there is such a stroke, the determination result in S22 is Yes. Even if there is a write at the tap position, if the write is a permanent write (the “permanent” flag is 1), the determination result in S22 is No.

  If the determination result in S22 is No, it means that the user has tapped a place unrelated to writing or tapped permanent writing, and thus is not a target of the process of FIG. 4 for changing the state of temporary writing. . Therefore, in this case, the tap receiving unit 26 ends the process.

  When the determination result in S22 is Yes, the tap receiving unit 26 determines whether the tap type acquired in S20 is a single tap or a double tap (S24). When the tap type is a double tap, the tap accepting unit 26 perpetuates the temporary writing at the tap position detected in S22 (S26). That is, the value of the “permanent” flag of the write in the write table 32 is set to 1.

  In this embodiment, the double tap is treated as a permanent operation (an operation for storing writing as permanent), but other operations may be treated as a permanent operation. Persistent operations are more complicated to determine than the display extension operation described later (those that require a large number of operations, those that require multiple touches, those that require a long time to operate, Etc.).

  If the tap type is a single tap, the tap accepting unit 26 extends the period for displaying the writing (S28). The display period may be extended by, for example, reducing the display density attenuation coefficient. As another example, the display period may be extended by returning the display density to the initial value. Moreover, you may perform both of them. For example, in the writing table 32 shown in FIG. 2, for ID = 4 writing, display extension is performed to reduce the attenuation coefficient to half of the initial value 3.3 (1.65).

  In this embodiment, a single tap is handled as a display extension operation (that is, an operation for extending the time during which writing is displayed), but other operations may be handled as a display extension operation.

  In the procedure of FIG. 4, in S22, the temporary writing registered in the writing table 32 whose density is 0 (that is, the temporary writing that is not displayed) may be excluded from the target. . That is, even if there is temporary writing at the tap position, if the writing density is 0, the determination result in S22 is No. This is because if there is accidental writing with a density of 0 at a location where the user has accidentally tapped, if the writing is restored and displayed, the user may feel uncomfortable. As another method, the temporary write entry whose density is 0 may be deleted from the write table 32.

  An example of a change in display density due to a temporary write state change (permanent display extension) according to the procedure of FIG. 4 will be described with reference to FIG.

  A graph 100 shown in FIG. 5A shows an example of the attenuation of the density of temporary writing when the state is not changed by tapping as a comparison target. In this example, the density is attenuated with a certain slope from the initial value.

  On the other hand, a graph 102 shown in FIG. 5B shows a change in writing density when a single tap is performed for a while after the writing is performed and then a double tap is performed after a while. In this example, after writing, the density decreases from the initial value at a constant rate (attenuation coefficient). However, once a single tap is made for the writing, the density once returns to the initial value, and then It attenuates at the attenuation factor of half of the original. When the double tap is made for the writing, the writing density is fixed at the initial value. The density change pattern shown in FIG. 5B is merely an example.

  The embodiment of the present invention has been described above. The embodiment described above is merely an example, and various modifications are possible within the scope of the present invention.

  For example, in the above embodiment, the display density for temporary writing is attenuated at a constant rate, but this is only an example. Another attenuation pattern (such as a function representing a temporal change in concentration that decreases with the passage of time) may be used. As another attenuation pattern (attenuation function), for example, a pattern in which the density monotonously attenuates is used.

  In particular, for example, as shown in FIG. 6, an attenuation function 110 may be used which attenuates more strongly in a period closer to the time when writing is performed, and decreases the degree of attenuation as time passes from that time. In this way, if an attenuation pattern (called an initial strong attenuation pattern) that attenuates more strongly in a period closer to the time when writing is written is used, the user immediately after writing the writing is reading the writing or its surroundings. It is easy to recognize that the writing density is attenuated. If the initial strong attenuation pattern is adopted, for example, the recognition time of the write density attenuation immediately after the write operation can be set while the same pattern for decaying at the constant speed shown in FIG. It becomes possible to raise more. Immediately after the writing operation, it is highly likely that the user is paying attention to the writing, so the user recognizes the attenuation of the concentration at that time, and if necessary, takes measures such as a display period extension operation or a permanent operation for the writing. Do.

  Note that the attenuation function 110 illustrated in FIG. 6 in which the slope (attenuation coefficient) of the attenuation function constantly decreases with the passage of time is merely an example of the initial strong attenuation pattern. In addition to this, for example, the attenuation coefficient gradually decreases for a predetermined first period from the time of entry of writing, and after that period, the concentration remains a low value larger than 0 (attenuation coefficient = 0). Then, the attenuation function whose density becomes 0 when the second period (which is longer than the first period) has elapsed since the entry time is also an example of the initial strong attenuation pattern. In addition, an attenuation function in which the density decreases with a slope a during a first period from the writing entry time and decreases with a slope b smaller than a after the first period is also an example of the initial strong attenuation pattern. is there.

  Further, the writing display control unit 24 may distinguish between temporary writing and permanent writing in a display mode. For example, display colors for temporary writing and permanent writing are different. This makes it easy for the user to distinguish between temporary writing and permanent writing.

  In the above embodiment, the temporary writing is made permanent by a tap operation. Conversely, when a specific tap operation is performed on the permanent writing, the writing is changed to the temporary writing. May be.

  If the electronic document includes a plurality of pages, pages displayed on the screen by the document display control unit 10 and pages not displayed on the screen appear. In the above embodiment, the density of the writing is attenuated as time passes without distinguishing whether or not the temporary writing is displayed on the screen. As a modification to this, for the temporary writing on the page not displayed on the screen, the attenuation of the density may be stopped. In this modified example, the writing management unit 30 is limited to writing the unprocessed entries acquired by searching from the writing table 32 in steps S10 and S12 in the procedure of FIG. 3 to the page currently displayed by the document display control unit 10. That's fine. As a result, the density of temporary writing with respect to the page being displayed is attenuated as time passes, but the density of temporary writing with respect to the page not being displayed is maintained. In this modified example, while the page on which the temporary writing is written is not displayed on the screen, the progress of the display period of the temporary writing is paused by temporarily stopping the attenuation of the density of the temporary writing. However, the end of the display period is extended.

  For example, it is common to read an electronic document including a plurality of pages while going back and forth between pages. For example, the text may be read while appropriately referring to a drawing on another page. In such a case, when another second page is read after writing for reading comprehension on the first page, reading of the first page is interrupted during that time. At this time, for example, if reading of the first page reading aid disappears while it takes time to read the second page, the role of reading assistance when the user returns to reading the first page. Is not fulfilled. On the other hand, as in this modification, if temporary writing on a page that is not displayed is stopped, the progress of the clock is stopped while the second page is being read. The writing density is maintained. Therefore, when the user returns to reading the first page, the user can refer again to the temporary writing that was referred to when the user left the first page. The method of this modified example is particularly effective when, for example, a document that takes time to read or an important document is read carefully.

  In the case of a document that is easy to read and does not need to read back the same part, the sentence can be understood to a considerable extent on the spot, and there is little reference later. For this reason, there is no problem even if the attenuation of the concentration is advanced regardless of whether other pages are read. Therefore, as an example, it may be possible for the user to set whether or not to proceed with the density attenuation of temporary writing in a certain page even while browsing another page.

  Further, in the above embodiment, the density of non-permanent writing (temporary writing) is gradually attenuated to finally become 0, but this is only an example. Instead, the density of the temporary writing is kept constant without being attenuated, and the writing is erased when a predetermined display period elapses from the time when the writing is input (input time) (that is, the writing table 32). Or the density may be reduced to 0). However, if the density is gradually attenuated, it is easier for the user to recognize that the writing will eventually disappear.

  As described above, even in the example in which the density of the temporary writing is not attenuated and the display is suddenly erased when the display period elapses from the input time, the page on which the temporary writing is written is not displayed on the screen as in the above-described modification. In the meantime, the progress of the display period may be temporarily stopped.

  In the above example, the temporary writing is erased when a predetermined display period (for example, the period from the input time of the temporary writing until the writing density becomes 0) elapses, but this is only an example. . Alternatively, the temporary writing may be erased when another erasure condition is satisfied. As an example of the erasing condition other than the elapse of the display period, for example, the electronic document that has been displayed by the document display control unit 10 is closed (that is, the file of the electronic document is closed). As another example, closing the electronic document a predetermined number of times may be used as the erasing condition. In this example, for example, the writing table 32 (see FIG. 2) records the number of times the electronic document is closed after the writing is input for each writing, and this number reaches a predetermined threshold for a certain box. In this case, the writing may be erased (for example, the density is set to 0). Further, in this case, the density is reduced and displayed each time the electronic document is closed and reopened until the predetermined number of times is reached (that is, the display density decreases as the number of times recorded in the writing table 32 increases). Also good. For example, when writing is input, it is displayed at a density of 100%, and when the electronic document is closed and then reopened, the writing is displayed at a density of 80%, and the electronic document is further closed and reopened. In such a case, the writing is displayed at a density of 60%.

  In the above example, a device equipped with a touch panel display is used as a browsing device, and a method for instructing permanent writing or a display period (lifetime) extension by a tap operation on the writing is used. Not too much. As a browsing device, a device using a normal display device that is not a touch panel display (for example, a personal computer) can also be used. In this case, a pointing operation such as a mouse is used instead of a tap for a permanent writing operation. What is necessary is just to perform by operation using a device (for example, single click, double click, etc. in a state where the cursor position is matched with the target writing).

  Even in a browsing device equipped with a touch panel display, the input method for writing on the electronic document is not limited to handwriting on the touch panel, and may be another method such as text input using a soft keyboard. In addition, the instruction to make the writing permanent or the like is not limited to a single tap or double tap operation, but may be performed by a touch gesture other than these (for example, swipe).

  In the above example, the browsing device provided with the display device has all of the document display control unit 10, the writing UI unit 20, and the writing management unit 30 shown in FIG. 1, but this is an example of a system configuration. Not too much. One or more of the document display control unit 10, the writing UI unit 20, and the writing management unit 30, or a part of each of these components are executed by a server connected to the browsing device via the network. May be.

  The information processing mechanism such as the browsing device exemplified above is realized, for example, by causing a computer to execute programs representing the above-described functions. Here, the computer includes, for example, a microprocessor such as a CPU, a memory (primary storage) such as a random access memory (RAM) and a read only memory (ROM), a flash memory, an SSD (solid state drive), an HDD as hardware. (Hard disk drive) and other controllers that control secondary storage devices, various I / O (input / output) interfaces, network interfaces that control connections to networks such as local area networks, etc. Circuit configuration connected via A program in which the processing content of each function is described is stored in a secondary storage device such as a flash memory via a network or the like, and is installed in a computer. The program stored in the secondary storage device is read into the RAM and executed by a microprocessor such as a CPU, thereby realizing the functional module group exemplified above.

10 Document display control unit, 20 Write UI unit, 22 Write reception unit, 24 Write display control unit, 26 Tap reception unit, 30 Write management unit, 32 Write table.

Claims (10)

Computer
Storage means for storing writing on the electronic document;
Generation means for generating a display image for displaying the electronic document together with the writing, and generating means for generating the display image not including the writing when a predetermined erasing condition is satisfied for the writing;
Program to function as. Means for changing the writing to permanent writing when a permanent operation for the writing stored in the storage means is received from a user;
Further including
The program according to claim 1, wherein the generation unit includes the permanent writing in the display image even when the erasing condition is satisfied.   The program according to claim 2, wherein the generation unit sets the permanent writing in the display image to a display mode that is distinguishable from the writing that has not been changed to permanent writing. The storage means stores an input time when the writing is input to the electronic document in association with the writing,
The erasing condition is that a predetermined display period has elapsed from the input time.
The program according to any one of claims 1 to 3.   5. The program according to claim 4, wherein the generation unit attenuates the writing display density included in the display image as the input time elapses.   6. The generation unit according to claim 5, wherein the degree of attenuation of the display density at a first time immediately after the input time is greater than the degree of attenuation at a second time after the first time. The program described in.   The program according to claim 5 or 6, further comprising means for reducing a rate of attenuation of the display density of the writing when a specific operation for the writing is received from a user.   The program according to any one of claims 4 to 6, further comprising means for extending the display period corresponding to the writing when a display extending operation for the writing is received from a user. The storage means further stores a page of the electronic document that is a target of the writing in association with the writing,
The generation means pauses the progress of the display period for the writing intended for a page different from the page on which the display image is displayed on the screen.
The program according to any one of claims 4 to 8, characterized in that: Storage means for storing writing to the electronic document;
Generating means for generating a display image for displaying the electronic document together with the writing, and generating means for generating the display image not including the writing when a predetermined erasing condition is satisfied for the writing;
A display control device.

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