JP2006091033A - Teleconference system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To associate an overwriting position with a conference document position in a teleconference. <P>SOLUTION: In personal computer (PC) terminals 100P, 100T and 100Tm for creating conference information and a teleconference system for displaying the conference information created by the PC terminals 100P, 100T and 100Tm on a conference information display means ( display united coordinate input device 110), a position adjusting means for adjusting the position by associating the position of the conference information which is displayed on the conference information display means, with the overwrite information which is overwritten on the conference information, is provided. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an electronic conference system used for conferences, lectures, presentations, classes, and the like.

  Conventionally, conferences and lecture materials are generally created on a PC (personal computer) using a document creation program, a projector is connected to the PC, and materials are displayed to hold conferences and lectures. At this time, if the explanation location is not known, sufficient understanding cannot be obtained, so that marks are drawn on the target location or characters are drawn for supplementary explanation. As a technique for drawing such a conference material, a technique is disclosed in which page information is added to a document for printing, page information is automatically detected, and overwriting and page alignment are performed (see, for example, Patent Document 1). In addition, a method for drawing overwriting data directly on an image memory is disclosed (for example, see Patent Document 2). In addition, a method of separating and storing the PC image and handwritten information at the time of overwriting and displaying them at the time of display is known (for example, see Patent Document 3).

  Further, in a PC conference in which a plurality of PCs are connected to a network and common conference materials are displayed on all the PCs, explanation portions are marked for smooth progress of the conference, or characters are drawn for supplementary explanation. As a conventional technique related to this, there is disclosed a method in which the server manages the window display state in the client-server method, and unifies the size of the client window when there is a change (see, for example, Patent Document 4). . In addition, a method of overwriting electronic mail, transmitting separately from electronic mail, and displaying electronic mail and overwriting is disclosed (for example, see Patent Document 5). Further, a method of instructing by a button or key input for unifying the window position (display position, width, height) is disclosed (for example, see Patent Document 6). Further, it is disclosed that the mouse operation is disabled by displaying a full-screen transparent window, and the screen is unified by transferring and displaying files (for example, see Patent Document 7).

  In addition, in the presentation that is performed by connecting a projector to a tablet PC or connecting a large display device with a touch panel (PDP, liquid crystal rear projector, etc.) and displaying it, supplementary explanations or explanation points Characters are drawn by hand on the conference material for the purpose of clarification. As a related technique, only image data of a document created by HTML is extracted, this image data is linked to page information and position information, a reduced list is displayed, and the selected image is displayed on the screen based on page information and link information. A technique for displaying is known (see, for example, Patent Document 8). There is also known a technique for displaying a target image by marking a scroll box position when a target document (image) is displayed, displaying the mark, and moving the scroll box to the target mark. (For example, refer to Patent Document 9).

JP 2000-215000 A JP 2001-31264 A JP 2000-16384 A JP-A-8-185302 JP 11-143794 A JP 2000-259535 A JP 2003-91490 A JP 2000-90035 A Japanese Patent Laid-Open No. 2000-172401

  However, in the conventional technology as shown above, when the document is scrolled and the page is changed, this overwriting has no meaning and will be obstructed. In most cases, the display needs to be overwritten first. Further, when overwriting is performed on a document, it is not possible to understand the meaning even if only the overwriting is stored and displayed, so it is necessary to store the overwriting associated with the overwritten document. This cannot be associated unless position information such as the page number and line number of the display document is known. There are programs that provide location information for this document, but most programs do not. In Patent Document 1, special information is required for additional printing of page information once and further identifying page information. Further, according to Patent Document 2, the overwrite position information is retained and displayed even in the enlarged / reduced display and the scroll display, but once the display is changed, the APL disappears and the same image is displayed again by the APL. It does not have information such as position and display magnification, and the overwrite data cannot be aligned and displayed. In Patent Document 3, the positional relationship between the image and the overwrite is unknown, and it is necessary to manage the display position of the image and the overwrite in association with each other.

  Further, when the conference material is scrolled and the page is changed, the relationship between the display information and the overwrite information is lost and has no meaning, so the overwrite data is saved and deleted. When a conference material that has been overwritten again is displayed, in order to display this overwriting, it is necessary to know where the conference material was overwritten and where it is currently displayed. There is a program (Microsoft Office) that provides an API for acquiring a page number, a display position, a display magnification, and the like during display, but almost no program provides this function. Note that the method of Patent Document 4 requires a server for managing the window display state, and the display position is not managed. Further, in the case of Patent Document 5, it is a condition that the display state of the electronic mail at the time of display is the same as that at the time of overwriting. Further, in the method of Patent Document 6, when the content displayed in the window is updated, the display content cannot be updated. In the case of Patent Document 7, the conference material needs to be filed in units of pages.

  In addition, the overwriting has a meaning for the conference material at the time of overwriting, and it becomes an obstacle when the display change (scrolling, page turning) of the conference material is performed. For this reason, when there is no need to redisplay, it is necessary to delete, and when necessary, a save operation is required.

  The present invention has been made in view of the above, and a first object thereof is to associate overwriting with a conference material position in an electronic conference. A second object of the present invention is to eliminate the need to save overwriting information for conference information in an electronic conference.

  In order to solve the above-described problems and achieve the object, the invention according to claim 1 is a PC terminal for creating conference information, and an electronic device for displaying and outputting the conference information created by the PC terminal on the conference information display means. The conference system is characterized by comprising position alignment means for performing position alignment by associating the positional relationship between the conference information displayed and output on the conference information display means and the overwrite information overwritten on the conference information.

  According to the first aspect of the present invention, the position information displayed by an application program that does not provide position information such as the page number and line number of the displayed meeting information (document) can be provided. Meeting information (document) positions can be matched.

  The invention according to claim 2 is characterized in that the position matching means stores the conference information and the overwrite information, and redraws the position at the time of the overwrite drawing.

  According to the invention of claim 2, in claim 1, for example, in a meeting, a presentation, etc., the explanation part and the supplementary explanation are directly drawn on the meeting information, and the overwriting position is automatically set for the scroll display. Matching with meeting information is performed.

  Further, the invention according to claim 3 is characterized in that the position matching means calculates a Y coordinate of a scroll space of an area for displaying the conference information and the overwrite information.

  According to the invention of claim 3, in claim 1, for example, in a meeting, presentation, etc., the explanation part and the supplementary explanation are directly drawn on the meeting information, and the overwriting position is automatically set for the scroll display. Matching with meeting information is performed.

  Further, the invention according to claim 4 is characterized in that the position matching means calculates an X coordinate of a scroll space of an area for displaying the conference information and the overwrite information.

  According to the invention of claim 4, in claim 1, for example, in a meeting, a presentation, etc., the explanation part and the supplementary explanation are directly drawn on the meeting information, and the overwriting position is automatically set for the scroll display. Matching with meeting information is performed.

  The invention according to claim 5 is characterized in that the position matching means detects a change in display magnification due to a history of overwriting information with respect to the conference information.

  According to the invention of claim 5, in claim 1, a shift between the overwrite position and the conference information position due to the difference between the magnification at the time of overwriting and the display magnification is detected by automatically detecting a change in display magnification at the time of overwriting. Can be eliminated.

  The invention according to claim 6 is characterized in that the position alignment means calculates a current display magnification from a height ratio of a vertical scroll box when detecting a change in the display magnification.

  According to the invention of claim 6, when a change in display magnification is detected in claim 5, the current display magnification is calculated from the height ratio of the vertical scroll box so that the magnification at the time of overwriting is unknown. Even if it exists, it becomes possible to obtain the overwriting magnification.

  Further, the invention according to claim 7 is characterized in that the position matching means detects a change in window size due to a history of overwriting information with respect to the conference information, and adjusts to the size at the time of overwriting.

  According to the invention of claim 7, in claim 1, the window size at the time of overwriting is unknown by detecting a change in the window size due to the history of overwriting information on the conference information and adjusting to the size at the time of overwriting. Even if it exists, it is automatically restored to the window size at the time of overwriting.

  The invention according to claim 8 is characterized in that, when the conference information is moved, the position matching means aligns an overwrite position with respect to the window movement of the conference information.

  According to the invention of claim 8, when the conference information is moved in claim 1, the overwrite position is automatically corrected by matching the overwrite position with respect to the window movement of the conference information.

  Further, the invention according to claim 9 is characterized in that the position matching means can re-display the overwrite information from the stored overwrite information to the position at the time of overwriting and edit the overwriting information.

  According to the invention of claim 9, in claim 1, the overwrite information is re-displayed from the saved overwrite information to the position at the time of overwriting, and the overwrite information can be edited, so that the overwrite information can be regenerated. Can be used.

  According to a tenth aspect of the present invention, a plurality of PC terminals and a conference information display unit are connected on a network, one of the plurality of PC terminals is a PC conference operation right terminal, and the other PC terminal is a PC. An electronic conference system that performs conferences by mutually outputting conference information created on a PC terminal as a conference participation terminal, and associating the positional relationship between the conference information and overwritten information overwritten on the conference information Position alignment storage means for performing alignment and storing is provided.

  According to the invention of claim 10, overwriting information for conference information is automatically saved by associating the overwriting position with the meeting information position, so that the save operation by a save button for overwriting information or the like is saved at the time of redisplay. There is no need to search for the desired overwrite information from the image.

  According to an eleventh aspect of the present invention, when the PC conference operation right terminal changes the display position of the conference information and the overwriting information, the PC conference participation terminal receives the changed conference information and The overwriting information is displayed at the same position.

  According to the invention of claim 11, in claim 10, when the display position of the conference information and the overwrite information is changed, the PC conference operation right terminal sends the changed conference information to the PC conference participation terminal. And the overwrite information at the same position, the image of the operation PC can be quickly reflected on the participating PC.

  In the invention according to claim 12, the PC conference operation authority terminal may change the conference information and the changed conference information to the PC conference participation terminal when the size of the conference information and the overwrite information is changed. The overwriting information is displayed in the same size.

  According to the twelfth aspect of the present invention, in the tenth aspect, when the size of the conference information and the overwrite information is changed, the PC conference operation right terminal sends the changed conference information to the PC conference participation terminal. And the overwrite information in the same size, the image of the operation PC can be quickly reflected on the participating PCs.

  The invention according to claim 13 is the PC conference operation authority terminal, when the horizontal scroll box position of the conference information and the overwrite information is changed, the PC conference participation terminal, the changed conference. The information and the overwrite information are displayed at the same position.

  According to the invention of claim 13, in claim 10, the PC conference operation right terminal is changed to the PC conference participation terminal when the horizontal scroll box position of the conference information and the overwrite information is changed. By displaying the conference information and the overwrite information at the same position, it is possible to quickly reflect the image of the operation PC on the participating PC.

  Furthermore, the invention according to claim 14 is directed to the PC conference operation authority terminal, when the vertical scroll box position of the conference information and the overwrite information is changed, the PC conference participation terminal is changed to the changed conference. The information and the overwrite information are displayed at the same position.

  According to the fourteenth aspect of the present invention, in the tenth aspect, the PC conference operation right terminal is changed to the PC conference participation terminal when the vertical scroll box position of the conference information and the overwrite information is changed. Further, by displaying the conference information and the overwrite information at the same position, the image of the operation PC can be quickly reflected on the participating PC.

  According to the fifteenth aspect of the present invention, when the PC conference operation right terminal is overwritten on the conference information, the PC conference participation terminal transmits the screen coordinates by the overwrite operation to the PC conference participation terminal. , Drawing on the screen, converting to scroll space coordinates and saving.

  According to the fifteenth aspect of the present invention, in the tenth aspect, the overwriting on the conference information is drawn with the overwrite operation coordinate information, so that the image of the operation PC can be quickly reflected on the participating PC. .

  In the invention according to claim 16, when the PC conference operation right terminal overwrites and erases the conference information, it transmits the screen coordinates by the overwrite erase operation to the PC conference participation terminal, and the PC conference participation terminal The terminal is characterized by deleting the screen and updating the overwrite information.

  According to the sixteenth aspect of the present invention, in the tenth aspect, the overwriting on the conference information is erased by the overwriting operation coordinate information, so that the image of the operating PC can be quickly reflected on the participating PC. become.

  The invention according to claim 17 is characterized in that the PC conference operation right terminal stores the conference information and overwrite information, and redraws to the position at the time of overwrite drawing. Conference system.

  According to the seventeenth aspect of the present invention, in the tenth aspect, it is not necessary to leave a memo on paper or the like during the conference by redrawing at the position where the overwriting is drawn anytime after the conference is over.

  The invention according to claim 18 is characterized in that the PC conference operation right terminal can re-display the overwrite information from the saved overwrite information to the position at the time of overwriting and edit the overwriting information. .

  According to the eighteenth aspect of the present invention, in the tenth aspect, it is possible to make the minutes by correcting the overwrite at any time after the conference ends.

  According to a nineteenth aspect of the present invention, in the electronic conference system that displays and outputs the conference information created by the PC terminal on the conference information display means, the conference material is overwritten on the conference material. In this case, the information processing apparatus includes a storage display unit that calculates an overwrite information position and stores and displays stroke data of the overwrite information by associating the meeting material with the position and page number of the overwrite information.

  According to the present invention, when overwriting the conference material, the overwriting information position is calculated, and the stroke data of the overwriting information is stored and displayed by associating the position of the conference material with the overwriting information and the page number. By doing so, for example, in the presentation of meetings and lectures, page turning of materials, deletion of overwriting at the time of scroll display, and saving operation become unnecessary, and prevention of concentration confusion and elimination of waste of time due to deletion and saving operation are eliminated. It becomes possible.

  The invention according to claim 20 is characterized in that the storage display means acquires an image of an overwrite page when the page list of the overwrite information is displayed.

  According to the twentieth aspect of the present invention, in the twentieth aspect, by acquiring the image of the overwrite page when the page list of the overwrite information is displayed, the operation for saving a plurality of images on the same page becomes unnecessary. It is possible to prevent distractions and waste time.

  The invention according to claim 21 is characterized in that the storage display means reduces and displays the overwrite information at the position at the time of overwriting when the page list of the overwriting information is displayed.

  According to the twenty-first aspect of the present invention, in the nineteenth aspect, when the page list of the overwrite information is displayed, the overwrite information is displayed in a reduced size at the position at the time of overwriting, thereby preventing concentration of concentration due to the saving operation and wasting time. Can be eliminated.

  According to a twenty-second aspect of the present invention, the storage display unit selects a page from the page list of the overwrite information, calculates a horizontal scroll box position displayed in a display area on the screen of the selected page, and The horizontal scroll box is moved to the calculation position, and the selected page is displayed.

  According to the twenty-second aspect of the present invention, when the page list of the overwrite information is displayed in the nineteenth aspect, the overwriting information is reduced and displayed at the position at the time of overwriting, so that the page turning operation of the document becomes unnecessary, and the saving operation It is possible to prevent distraction of concentration and waste time.

  In the invention according to claim 23, the storage display means selects a page from the page list of the overwrite information, calculates a vertical scroll box position displayed in a display area on the screen of the selected page, and The vertical scroll box is moved to the calculation position to display the selected page.

  According to the twenty-third aspect of the present invention, in the nineteenth aspect, a page is selected from the page list of the overwrite information, the vertical scroll box position displayed in the display area on the screen of the selected page is calculated, and this calculation is performed. By moving the vertical scroll box to the position and displaying the selected page, the page turning operation of the document becomes unnecessary, and it is possible to prevent the distraction of concentration due to the saving operation and waste of time.

  The invention according to claim 24 is characterized in that the storage display means selects a position in the page from the page list of the overwrite information, and displays the selected position in the vicinity of the center of the display area on the screen. And

  According to the twenty-fourth aspect of the present invention, in any one of the twenty-second to twenty-third aspects, the position in the page is selected from the page list of the writing information, and the selected position is set near the center of the display area on the screen. By displaying on the screen, the scroll operation for displaying the target portion in the page becomes unnecessary, and it is possible to prevent the distraction of the concentration due to the scroll operation and waste time.

  Further, the invention according to claim 25 is characterized in that the storage display means displays information selected from the overwrite page list, and then redraws the overwrite on the same page at the position at the time of overwriting.

  According to the twenty-fifth aspect of the present invention, in any one of the twenty-fourth to twenty-fourth aspects, after the information selected from the overwrite page list is displayed, the overwrite on the same page is redrawn at the position at the time of overwriting. This eliminates the need to perform overwriting search on the displayed document, thereby preventing distraction of concentration due to the search operation and eliminating waste of time.

  According to a twenty-sixth aspect of the present invention, the storage and display means displays the image of the page selected from the overwrite page list and the overwrite information in a full screen.

  According to the invention of claim 26, in any one of claims 20 to 25, a meeting (lecture) document is displayed by displaying the image of the page selected from the overwrite page list and the overwrite information in full screen. The display area is increased, the scrolling operation is reduced, and it is possible to prevent distraction of concentration and waste of time due to the scrolling operation.

  According to a twenty-seventh aspect of the present invention, the storage display means can add and delete overwrite information when displaying the image of the page selected from the overwrite page list and the overwrite information in full screen. Features.

  According to the twenty-seventh aspect of the present invention, in the twenty-sixth aspect, when the image of the page selected from the overwrite page list and the overwrite information are displayed in full screen, the overwrite information can be added and deleted. , It becomes possible to specify supplements and explanations by handwriting on conference (lecture) materials.

  The electronic conference system according to the present invention (Claim 1) enables position information displayed by an application program that does not provide position information such as the page number and line number of the displayed meeting information (document), Since the overwriting position and meeting information (document) position can be matched, it is possible to improve the efficiency of meetings and presentations by overwriting in advance, reuse when lectures on the same material are performed multiple times, and minutes As a result, it is possible to improve the efficiency of meetings and presentations.

  In addition, the electronic conference system according to the present invention (Claim 2) is that, in Claim 1, for example, in a meeting or a presentation, the explanation part and the supplementary explanation are directly drawn on the meeting information, and the scroll display is automatically performed. Thus, since the overwrite position and the conference information are matched, it is possible to improve the efficiency of the conference and presentation.

  Further, the electronic conference system according to the present invention (Claim 3) is the automatic conference system according to Claim 1, in which, for example, in a meeting or a presentation, the explanation part and the supplementary explanation are directly drawn on the meeting information, and the scroll display is automatically performed. Thus, since the overwrite position and the conference information are matched, it is possible to improve the efficiency of the conference and presentation.

  Further, the electronic conference system according to the present invention (Claim 4) is characterized in that, in Claim 1, for example, in a meeting, a presentation, etc., an explanation part and a supplementary explanation are directly drawn on the meeting information, and the scroll display is automatically performed. Thus, since the overwrite position and the conference information are matched, it is possible to improve the efficiency of the conference and presentation.

  In addition, the electronic conference system according to the present invention (Claim 5), according to Claim 1, automatically detects a change in the overwriting and the display magnification, thereby overwriting position and conference information due to the difference between the overwriting magnification and the display magnification. Since the deviation from the position is eliminated, there is an effect that the overwrite information can be efficiently used.

  In addition, the electronic conference system according to the present invention (Claim 6), according to Claim 5, when a change in display magnification is detected, by calculating the current display magnification from the height ratio of the vertical scroll box, Since it is possible to obtain the overwrite magnification even if the magnification is unknown, it is possible to efficiently use the overwrite information.

  In addition, the electronic conference system according to the present invention (Claim 7) detects the change in window size due to the history of overwriting information on the conference information according to Claim 1, and adjusts the size at the time of overwriting, thereby adjusting the size at the time of overwriting. Even if the window size is unknown, it is automatically restored to the window size at the time of overwriting, so that the overwriting information can be efficiently used.

  The electronic conference system according to the present invention (Claim 8) automatically adjusts the overwrite position according to Claim 1 by matching the overwrite position with respect to the window movement of the conference information when the conference information is moved. Since the correction is made, it is possible to display a plurality of materials and improve the efficiency in the conference or presentation to be performed.

  The electronic conference system according to the present invention (Claim 9) is characterized in that, in Claim 1, the overwrite information is redisplayed from the saved overwrite information to the position at the time of overwriting, and the editing process of the overwrite information is enabled. Since the overwrite information can be reused, it is possible to improve the efficiency of meetings and presentations.

  Further, the electronic conference system according to the present invention (claim 10) automatically saves the overwrite information for the conference information by associating the overwrite position with the conference information position, thereby performing a save operation using a save button for the overwrite information, Since the operation of searching for the desired overwrite information from the stored image at the time of redisplay is not required, a smooth PC conference is possible and the efficiency of the conference can be improved.

  The electronic conference system according to the present invention (claim 11) is the electronic conference system according to claim 10, wherein the PC conference operation right terminal is connected to the PC conference participation terminal when the display position of the conference information and the overwrite information is changed. By displaying the changed conference information and the overwrite information at the same position, it becomes possible to quickly reflect the image of the operation PC on the participating PC, so that a smooth PC conference is possible and the efficiency of the conference There is an effect that it can be realized.

  The electronic conference system according to the present invention (Claim 12) is the electronic conference system according to Claim 10, wherein the PC conference operation right terminal is connected to the PC conference participation terminal when the size of the conference information and the overwrite information is changed. By displaying the changed conference information and the overwrite information in the same size, it becomes possible to quickly reflect the image of the operation PC on the participating PC, so that a smooth PC conference is possible and the efficiency of the conference There is an effect that it can be realized.

  The electronic conference system according to the present invention (claim 13) is the electronic conference system according to claim 10, wherein the PC conference operation right terminal is a PC conference participation terminal when the horizontal scroll box position of the conference information and the overwrite information is changed. By displaying the changed meeting information and the overwrite information at the same position, it becomes possible to quickly reflect the image of the operation PC on the participating PC, thereby enabling a smooth PC meeting and a meeting. There is an effect that it is possible to improve efficiency.

  In addition, the electronic conference system according to the present invention (Claim 14) is the PC conference operation right terminal according to Claim 10, wherein the PC conference operation right terminal is changed when the vertical scroll box position of the conference information and the overwrite information is changed. In addition, by displaying the changed meeting information and the overwriting information at the same position, it is possible to quickly reflect the image of the operating PC on the participating PC, and thus a smooth PC meeting is possible. In addition, there is an effect that the efficiency of the conference can be improved.

  The electronic conference system according to the present invention (Claim 15) is characterized in that, in Claim 10, the overwriting on the conference information is drawn by the overwrite operation coordinate information, so that the image of the operation PC is quickly reflected on the participating PC. As a result, it is possible to achieve a smooth PC conference and to increase the efficiency of the conference.

  The electronic conference system according to the present invention (Claim 16) is characterized in that, in Claim 10, the overwriting on the conference information is erased by the overwriting operation coordinate information, so that the image of the operating PC is quickly transferred to the participating PC. Since it can be reflected, it is possible to achieve a smooth PC conference and to improve the efficiency of the conference.

  In addition, the electronic conference system according to the present invention (Claim 17) does not need to leave a memo on paper or the like during the conference by redrawing to the position where the overwriting is drawn at any time after the conference ends. Therefore, it is possible to avoid the interruption of the conference and to improve the efficiency of the conference.

  The electronic conference system according to the present invention (Claim 18) can make a minutes by modifying the overwrite at any time after the meeting ends in Claim 10, so that a new minutes is created. There is no need for time to do so, and the efficiency of the conference can be improved.

  In the electronic conference system according to the present invention (claim 19), when the conference material is overwritten, the electronic conference system calculates the overwrite information position, associates the position of the conference material with the overwrite information, and the page number, and the stroke of the overwrite information. By saving and displaying the data, for example, in presentations such as conferences and lectures, page turning of materials, deletion of overwriting at the time of scroll display, and saving operation become unnecessary, preventing concentration distraction due to deletion and saving operation and Since it is possible to eliminate waste of time, there is an effect that efficiency in meetings and presentations is improved.

  Further, in the electronic conference system according to the present invention (claim 20), in claim 19, when the overwrite information page list is displayed, the image of the overwrite page is acquired, thereby eliminating the need to save a plurality of images on the same page. Thus, it is possible to prevent the distraction of concentration due to the saving operation and to eliminate the waste of time, so that the efficiency in meetings and presentations is improved.

  The electronic conferencing system according to the present invention (claim 21) is the electronic conference system according to claim 19, wherein when overwriting information is displayed in a page list, the overwriting information is reduced and displayed at the position at the time of overwriting so Since it is possible to prevent waste and time, it is possible to improve the efficiency in meetings and presentations.

  Further, the electronic conferencing system according to the present invention (Claim 22) does not require a page turning operation of the document by displaying the overwrite information in a reduced position at the time of overwriting when displaying the page list of the overwrite information in Claim 19. Therefore, it is possible to prevent the concentration of concentration due to the storage operation and to eliminate the waste of time, thereby improving the efficiency in meetings and presentations. In addition, by marking only the pages necessary for the meeting from the material consisting of an enormous number of pages at appropriate locations in advance, it is possible to easily search in the overwriting list display.

  The electronic conference system according to the present invention (Claim 23) selects the page from the page list of the overwrite information in Claim 19, and sets the vertical scroll box position displayed in the display area on the screen of the selected page. By calculating, and moving the vertical scroll box to this calculation position and displaying the selected page, the page turning operation of the document becomes unnecessary, preventing the concentration of concentration by the saving operation and the waste of time. This makes it possible to improve the efficiency of meetings and presentations.

  The electronic conference system according to the present invention (Claim 24) selects the position in the page from the page list of the writing information in any one of Claims 20 to 23, and the selected position is displayed on the screen. Displaying near the center of the display area eliminates the need for scrolling to display the target location on the page, prevents distraction from the concentration of scrolling, and eliminates wasted time. This has the effect of improving efficiency in presentations and presentations.

  An electronic conference system according to the present invention (Claim 25), in any one of Claims 20 to 24, after displaying the information selected from the overwrite page list, Redrawing to the position eliminates the need for overwriting search on the displayed document, prevents distraction from the search operation, and eliminates wasted time, improving efficiency in meetings and presentations. There is an effect.

  Moreover, the electronic conference system according to the present invention (Claim 26), in any one of Claims 20 to 25, displays the image of the page selected from the overwrite page list and the overwrite information in full screen, The display area for conference (lecture) materials increases, scrolling operations are reduced, and it is possible to prevent the concentration of concentration by scrolling operations and to eliminate waste of time, thereby improving the efficiency of meetings and presentations. Play.

  The electronic conference system according to the present invention (Claim 27) adds or deletes overwrite information when the image and the overwrite information of the page selected from the overwrite page list are displayed in full screen. By making it possible, it becomes possible to supplement and clearly indicate the explanation part by handwriting on the conference (lecture) material, so that there is an effect of improving the efficiency in the conference or presentation.

  Exemplary embodiments of an electronic conference system according to the present invention will be explained below in detail with reference to the accompanying drawings.

(First embodiment)
In this embodiment, the document that is the conference information and the position information for overwriting the document are acquired. Further, in order to save the display document position and the overwrite position in association with each other, saving the screen image for displaying the document and the overwrite is executed. If overwriting or scrolling is displayed, the overwriting will be in the way, so save the screen image and delete the overwriting. If it is necessary to scroll the display so that the overwriting position remains and the previous overwriting is necessary, it is necessary to redraw. Or, it is necessary to perform troublesome operations such as displaying the saved image and returning to the document display in order to display the scroll portion. Therefore, the present invention eliminates the trouble of saving and redrawing overwriting by scrolling the document.

  Further, the same position of the document is displayed at a different position on the screen depending on the display magnification of the document. Even if rewriting is performed at the position at the time of 100% drawing and 120% display at the time of 100% display, a positional shift will occur. Therefore, the present invention prevents overwriting and document misalignment. Further, the same position of the document is displayed at a different position on the screen depending on the size of the display area window of the document. For this reason, if the size of the window at the time of overwriting differs from that at the time of display, a positional shift will occur even if the overwriting is redrawn. Therefore, the present invention prevents overwriting and document misalignment. When a plurality of windows are displayed side by side, the windows are usually moved in order to avoid overlapping the windows and losing sight of the explanation part. Even if the overwrite before movement is redisplayed after the movement to the position at the time of drawing, the overwriting position is shifted and it does not make sense. Therefore, the present invention enables movement of the APL window. Further, when the overwrite is stored, the document image and the overwritten image are stored. In this case, since the overwriting and the document image are integrated, an editing operation with only overwriting becomes difficult. Further, when a lecture or lecture using the same material is executed a plurality of times, a troublesome operation for selecting and displaying an overwritten image is required in order to display the overwrite at the time of the first lecture (lecture) prepared in advance. Therefore, the present invention enables re-use editing of overwriting. This will be specifically described below.

  FIGS. 1-1 to 1-3 are block diagrams illustrating a configuration example of the PC conference system according to the first embodiment of the present invention. As shown in these figures, the conferencing system includes a “multi-point conference” using terminals connected to each other via a communication network at a distant place, and mutual communication via a communication network in a conference room. It can be divided into “room conference” using terminals that are connected to each other and “desk conference” for meeting and contacting on the desk. In this specification, a terminal having a personal computer function is abbreviated as a PC or a PC terminal.

  In these drawings, reference numeral 10 is a LAN (Local Area Network), reference numeral 20 is a screen, reference numeral 30 is a projector, reference numeral 40 is a router, reference numeral 50 is a WAN (Wide Area Network), reference numeral Reference numeral 60 is a base station, reference numeral 70 is a general telephone, reference numeral 75 is a telephone line, reference numeral 100T is a tablet PC, reference numeral 100Tm is a tablet PC by wireless communication, reference numeral 100P is a widely used personal computer, reference numeral 110 is a display This is an integrated coordinate input device (PDP: liquid crystal rear projector, etc.).

  The tablet PC 100T (the lower side in FIG. 1-1) is connected to each PC terminal in the remote location via the LAN 10, the router 40, and the WAN 50. A PC terminal having a large display-integrated coordinate input device 110 as a display is installed in a conference room or the like, and a screen is shared by a plurality of people. The tablet PC 100Tm is connected to another PC terminal from the outside by a wireless modem. The tablet PC 100T (upper side in FIG. 1-1) shares the screen by outputting an image to the projector 30 and displaying the screen. A general PC 100P is inferior to a pen operation, but is operated with a mouse. A program used in the conference exists in each PC terminal.

  In other words, in the configuration of FIG. 1, position information such as the page and line of a document being displayed by an APL program operating under a general-purpose OS such as Windows (registered trademark of Microsoft Corporation in the United States) or MAC OS is not provided to other APLs. A handwritten character (figure) is overwritten and drawn on the document displayed by the APL program by the mouse operation, the drawing position is saved by matching the drawing position with the drawing position, and the drawing position is displayed again at the drawing position. In addition, a PDP with a coordinate input device installed transparently on the display surface, a large display device such as a liquid crystal rear projector is connected as a PC (PC) display, and lecture (lecture) materials created as PC electronic documents are displayed. Then, handwritten characters (figure) are drawn by overwriting with a coordinate indicator such as a pen, the drawing position is saved by matching the document position with the drawing position, and redisplayed at the document position at the time of drawing. In addition, a projector is connected to the tablet PC, conference materials created as electronic documents on the PC are displayed on the screen, handwritten characters (figure) are overwritten with a dedicated pen, and the drawing data is saved by matching the document position with the drawing position. Redisplay the document at the time of drawing.

  FIG. 2 is an explanatory diagram showing the configuration of the display-integrated coordinate input device 110 in FIG. Here, a large-sized (50 inch, 60 inch, etc.) liquid crystal projector will be described as an example of the display-integrated coordinate input device 110. The display-integrated coordinate input device 110 is mainly composed of a coordinate input device 111, a display device 112, and a host device 113. The coordinate input device 111 sets the position of the coordinate pointing object touched on the screen installed so as not to hide the screen of the display device 112 as the number of pixels (pixels) of the display device 112 (X-axis direction 1024, Y-axis direction 768, etc. ) Are detected periodically (5 ms, 10 ms, etc.) and sent to the host apparatus 113 via PCI / F (communication means such as RS232C, USB). The display device 112 displays the RGB image data output from the host device 113 on the liquid crystal screen and the PDP screen.

  FIG. 3 is an explanatory diagram showing a coordinate detection method in the coordinate input device 111 of FIG. Here, the light blocking method will be described as an example. The left coordinate indicator detector 115 and the right coordinate indicator detector 116 emit the irradiation light by the semiconductor laser, detect the light reflected by the optical recursive sales company member 114, convert it into analog data, and perform coordinate detection control. Send to device 117. When there is no coordinate indicator such as a finger or a pen on the screen, the irradiation light is reflected and received in the opposite direction by 180 degrees by the light retroactive sales company member 114 (see the arrow on the right side of the screen).

On the other hand, when a coordinate indicator is present on the screen, the irradiated light is blocked and not reflected by the light recursive sales company member 114, and the left coordinate indicator detector 115 and the right coordinate indicator detector 116 do not receive light. The left light blocking angle (θL) and the right light blocking angle (θR) are detected by the left coordinate indicator detector 115 and the right coordinate indicator detector 116 in the direction in which no light is received (light blocking angle). The X coordinate and Y coordinate of the coordinate indicator are calculated from W, θL, and θR according to the following formula.
X = W × tan θR / (tan θL + tan θR)
Y = H−W × tan θL × tan θR / (tan θL + tan θR)
Thereafter, the detected coordinates are notified by communication means such as RS232C and USB, which are standard equipment on the host PC 113.

  FIG. 4 is an explanatory diagram showing the configuration of the tablet PC in FIG. The tablet PC comes standard with a touch panel that can be used instead of a mouse with a pen instead of an existing PC that assumes keyboard and mouse operation, and text input can be performed by handwritten character drawing or character recognition instead of the keyboard. ing. In addition, “Windows (registered trademark of Microsoft Corporation) PC Tablet PC Edition (registered trademark)”, which is an OS for tablet PCs, has been released from Microsoft Corporation, and a handwritten character recognition engine, a speech recognition engine, and the like are provided.

  The tablet PC is composed of a liquid crystal display, a keyboard, and a mouse, like a general notebook PC, and can perform the same operation. The right side of FIG. 4 shows a state where the display is folded by rotating 180 degrees. The coordinate position of the electronic pen 101 on the display is detected by a sensor built in the electronic pen 101 and the tablet PC, and mouse click and drag operations are emulated. With the horizontal display and the electronic pen 101, handwritten characters that are difficult to operate with a mouse can be drawn as if writing on paper.

  The configuration of the display 102 on which the electronic pen 101 draws is shown in the lower right part of FIG. A tempered glass 102a is provided on the surface with which the electronic pen 101 is in direct contact to prevent the liquid crystal display unit 102b from being damaged. An electromagnetic induction sensor unit 102c that detects the position of the electronic pen 101 is provided under the liquid crystal display unit 102b, and has a structure that does not impair the image quality of the display. In this example, the display is folded, but the display part can be removed.

  FIG. 5A is an explanatory diagram of an example of a coordinate detection method using electromagnetic induction in FIG. 4. In this figure, a resonance circuit 103 having a coil 104 and a capacitor 105 is built in the electronic pen 101, and an induced electromotive voltage is generated in the coil 103 by a magnetic field caused by a current flowing in the sensor coil 106 of the electromagnetic induction sensor unit 102c. The resonance circuit 103 having the excitation is excited and a resonance current flows. The sensor coil 106 is installed at a density proportional to the coordinate detection accuracy. In this figure, a part of the sensor coil for detecting the X-axis direction is shown. Although not shown, a sensor coil for detecting the Y-axis direction is arranged in a direction perpendicular to this. The coordinate detection control device 107 controls the transmission / reception changeover switch 108 to connect the transmission / reception changeover switch 108 to the AC, flows current from the AC power source to the sensor coil, controls the X-axis coil changeover switch 109, and switches the switch at high speed. Sequentially pass current through the sensor coil. As a result, a magnetic field is sequentially generated on the sensor coil. This magnetic field causes the electronic pen 101 to resonate. Next, the transmission / reception selector switch 108 is connected to the BC, and the X-axis coil selector switch 109 is sequentially switched at high speed. At this time, an induced voltage is generated in the sensor coil by the magnetic field generated by the resonance current of the electronic pen 101. The induced electromotive voltage generated in the sensor call 106 is amplified and measured (V).

  FIG. 5-2 shows a distribution diagram of the induced electromotive voltage. When the electronic pen 101 is on (2) of the sensor coil 106, the induced electromotive voltage received from (2) of the sensor coil 106 is the highest. Thus, the X coordinate is determined by detecting the highest point of the induced electromotive voltage distribution. Although not shown, the Y coordinate is determined in the same manner.

  The detected coordinates of the electronic pen 101 are notified to the PC by PCI / F (RS232C, general-purpose I / F such as USB or dedicated I / F). Note that the coordinate detection control device 107 is built in the display 102.

  Next, scroll information that can be acquired by an I / F provided by the OS will be described with reference to FIG. First, as shown in the figure, the screen width (W) and the screen height (H) are acquired. The name of the file being input is obtained from the title window information and window caption. The window upper left origin coordinates (WX, WY), window width (WW), and window height (WH) in the document display area are acquired. Acquire all window information (upper left origin coordinates, width, height, window class) displayed on the screen, (Window upper left origin Y coordinate WY + WH), (Window class "ScrollBar": Value in Windows (registered trademark of Microsoft Corporation)) ) Is obtained, the upper left origin coordinates (HX, HY), window width (HW), and window height (HH) of the horizontal scroll bar window are acquired.

  Further, the horizontal scroll box width (HB) and the horizontal scroll box position (HP) are acquired. The arrow button width (HS) is acquired. Acquire all window information (upper left origin coordinates, width, height, window class) displayed on the screen, (upper left window origin X coordinate ≈ WX + WW), (window class "ScrollBar": Windows (registered trademark of Microsoft Corporation)) By retrieving the window, the upper left origin coordinate (VX, VY), window width (VW), and window height (VH) of the vertical scroll bar window are obtained, and the vertical scroll box height (VB), vertical The scroll box position (VP) is acquired, and the arrow button height (VS) is acquired.

Next, a calculation method from screen coordinates to scroll space coordinates will be described with reference to FIG. As shown in the drawing, when the horizontal scroll box is moved by HB length, the document in the document display area is scrolled and displayed in WW length. When the vertical scroll box is moved by VB length, the document in the document display area is scrolled by WH length. The entire document area displayed by scrolling is managed as a scroll space having a scroll width (SW) and a scroll height (SX). Further, the screen coordinates (X, Y) are converted into in-document area coordinates ((X-WX), (Y-WY)) and converted into scroll space coordinates (SX, SY).
SX = HP + (X−WX) / WW × HB
SY = VP + (Y−WY) / WH × VB

Next, a calculation method from the scroll space coordinates to the screen coordinates will be described with reference to FIG. As shown in the figure, the scroll space of the screen display area becomes upper left coordinates (HP, VP), width (HB), and height (H) according to the scroll information. The (SX-HP) length in the scroll space is the screen space length ((SX-HP) / HB × WW). The (SY-VP) length in the scroll space is the screen space length ((SY-VP) / VB × WH). From the scroll space coordinates (SX, SY), the screen coordinates (X, Y) are calculated as follows.
X = WX + (SX-HP) / HB × WW
Y = WY + (SY-VP) / VB × WH

  Next, an automatic detection method when the display condition is changed will be described with reference to FIG. The coordinates of the same point on the document differ depending on the document display magnification and the size of the document display area window. The change in display magnification is reflected in the horizontal scroll box width and vertical scroll box height. When the vertical scroll box height changes from VB to VB0, it indicates that the display magnification has changed to (VB / VB0). Changes in the size of the window are reflected in the window width and height.

  Next, the overwriting stroke data will be described with reference to FIG. In FIG. 10, (X0, Y0), (X1, Y1), (X2, Y2), (X3, Y3), (X4, Y4), (X5, Y5), (X6, Y6) are one stroke. Indicates the drag trajectory. Handwritten character drawing is performed by drawing a line between two points ((X0, Y0)-(X1, Y1), (X1, Y1)-(X2, Y2),...)) With a set color and thickness. Draw by The drag trajectory coordinates by the character drawing operation are converted into scroll space coordinates and saved in an overwrite file in units of strokes. The erasing of the handwritten character displays a rectangular area of the size set for the eraser with the pen touch point as the center, and the handwritten character in the rectangular area is erased by dragging it onto the handwritten character. A state in which the (X3, Y3)-(X4, Y4) line segment and the (X4, Y4)-(X5, Y5) line segment are erased and divided into two strokes by the handwritten character erasing operation is shown. Delete the deleted stroke data from the overwrite file. When a stroke is divided into a plurality of strokes by erasing, it is divided and stored into a plurality of strokes.

  Next, the overwrite area selection method will be described with reference to FIG. When the overwrite program is started, a full-screen transparent window is displayed to prevent the APL program from being executed by clicking on the overwrite area. Displays the “Select Area” dialog box and requests selection by clicking the overwrite area. Get the window information under the clicked coordinates and display the window frame (red). Display and confirm the "Area Confirmation" dialog box. Saves the window class and window style of the selected overwrite area to the overwrite file. The window information of the APL program that displays the document is acquired, and the window width and height are saved. Search the scroll bar to scroll the document area, save the horizontal scroll box width and vertical scroll box height.

  Next, the overwriting operation will be described with reference to FIG. As shown in the figure, when the overwriting program is started, an “overwriting toolbar” is displayed. The “Setting” button displays the “Overwrite Settings” dialog box, and selects the thickness and color of the overwrite pen. The eraser cursor length is selected by dragging the operation handle. With the “Pen” button, an overwrite window with a transparent full screen size can be displayed and overwritten. A handwritten character (figure) is drawn on the overwrite window by sequentially drawing a drag locus with the color and thickness set for the pen. Convert the drag trajectory coordinates to scroll space coordinates for each stroke and save them in the overwrite file. The “Eraser” button displays the eraser cursor rectangle with the mouse coordinates in the middle, deletes the overwrite in the rectangle, and deletes it from the overwrite file. The “APL” button closes the overwrite window and enables APL program operation. Switch to overwrite mode again with a pen or eraser button. At this time, the scroll bar information is acquired, the scroll space coordinates of the document display area are calculated, and if there is overwrite data in the area, redrawing is performed. When the display magnification is changed, the ratio to return to the display magnification at the time of overwriting is calculated (100% at the time of overwriting, if it is 120% of the current display (100120), a “display magnification setting” dialog box is displayed. APL window for displaying a document When the size of the window is changed, the “Window repair” dialog box is displayed.The window size is automatically repaired by the I / F provided by the OS. Enables redisplay and overwriting.

  Next, an overwriting browsing and correction method will be described with reference to FIG. When overwriting is finished, display the "Confirm Save" dialog box and confirm whether to save. The overwrite file 153 is designated by the “Save” dialog box, and the overwrite data is saved. The document APL program 151 is activated to open and display the document file 150 to be overwritten. The overwrite program 152 is activated, the “Open” dialog box is displayed by the “Open” button of the overwrite toolbar, the overwrite file 143 is opened, the scroll bar information of the document area is obtained, the scroll space coordinates of the displayed document are calculated, and the same space is entered. Draw overwriting for. After that, the same operation as when overwriting is performed, and overwriting can be added and deleted.

  Next, the overwrite control operation will be described with reference to the flowchart of FIG. First, the overwriting program is activated by means provided by the OS such as double-clicking on a desktop icon and displays an overwriting toolbar (step S1). Subsequently, overwriting start control is executed and initialized (step S2), and the operation mode is set to “APL” at the time of activation (step S3). At this point, the transparent overwrite window consisting of the full screen size is not displayed, and the mouse data is notified only for the operation on the overwrite toolbar. Subsequently, it is determined whether or not mouse data is input (step S4), and mouse data is input. Further, it is determined whether or not the mouse data is overwrite toolbar coordinates (step S5). If the mouse data is not overwrite toolbar coordinates, it is further determined whether or not the pen operation mode is set (step S6). In the pen mode, overwrite drawing control is executed with the start coordinate as an argument by the click ON start (pen down) coordinate input outside the overwrite toolbar (step S7). When the operation mode is “pen” or “erase”, an overwrite window is displayed and all mouse data is input. If it is not in the pen operation mode in step S6, it is further determined whether the operation mode is the erasing operation mode (step S8). Overwrite / erase control is executed (step S9). If it is an overwrite toolbar coordinate in step S5, an overwrite toolbar control is executed by using the start coordinate as an argument by clicking ON start (pen down) coordinate input to the overwrite toolbar (step S10). Further, it is determined whether or not to end (step S11), and if it is completed, the overwrite toolbar is deleted by the “overwrite” button on the overwrite toolbar (step S12), and a save confirmation dialog is displayed (step S13). Here, it is determined whether or not to save (step S14), and if so, save dialog processing is executed (step S15), and the file is saved in an overwrite file (step S16).

  Next, the overwrite start control operation will be described with reference to the flowchart of FIG. First, a work overwrite file is created (step S21). Further, default values of pen color, thickness, and eraser length are set in the control data (step S22), a full-screen transparent window is displayed (step S23), a dialog box is displayed (step S24), and an overwrite area is set. Request a click to a location. It is determined whether or not mouse data is input (step S25). If mouse data is input, it is further determined whether or not the click is OFF (step S26). If the click is OFF, window information of the click OFF (pen-up) coordinates (the highest level outside the transparent window) and APL program window information as the parent window are acquired (step S27), and the document area window frame is displayed (step S27). S28), an “area confirmation” dialog box is displayed (step S29) and confirmed. Subsequently, it is determined whether it is an overwriting area (step S30). If it is not an overwriting area, the document area window frame is deleted (step S31). If it is an overwrite area in step S30, the full-screen transparent window is deleted (step S32), and the APL window handle and document area (overwrite area) window handle are set in the control data (step S33). Further, the document area window class and window style are set in the overwrite file (step S34), and the horizontal scroll bar window is searched from the document area window information (step S35). Subsequently, it is determined whether or not the search is successful (step S36). If a horizontal scroll bar window exists, the horizontal scroll bar handle is set in the control data (step S37). Further, the horizontal scroll box information is acquired, and the horizontal scroll box width is set in the control data (step S38). Subsequently, the vertical scroll bar window is searched from the document area window information (step S39), and it is determined whether the search is successful (step S40). If the vertical scroll bar window exists, the vertical scroll bar handle is transferred to the control data. Set (step S41). Further, the vertical scroll box information is acquired, and the vertical scroll box height is set in the control data (step S42).

  Next, the overwrite toolbar control operation will be described with reference to the flowcharts of FIGS. 16-1 and 16-2. Here, the click ON start coordinate is executed as an argument. First, the current overwrite toolbar button display state is saved (step S51). Subsequently, button information of the coordinates at the start of the click ON is acquired (step S52), and other than the click button is normally displayed and the click button is selected and displayed (step S53). The button display has two forms of normal display and selection display. Subsequently, mouse data up to the click OFF is input (step S54). It is determined whether the click is OFF (step S55). If the click is not OFF, it is further determined whether the coordinates are on the click button (step S56). When the coordinates are outside the button at the time, the button display state is restored (step S57). If the coordinates are on the click button in step S56, click button selection display is performed (step S58). If the click is OFF in step S55, it is further determined whether the coordinates are on the click button (step S59). If the coordinates are on the click button, it is further determined whether the coordinates are a pen button (step S60). If there is, it is further determined whether the operation mode is APL (step S61). Here, when the coordinates within the button are the same as those at the start of the click ON when the click is OFF, the button function is executed. The “pen” button is used to shift from the APL mode to the pen mode and from the erase mode to the pen mode (step S62). When the pen mode is changed from the APL mode, it is detected whether the document display state (display magnification, APL program window size) has changed. It is determined whether or not overwriting is possible (step S63). If overwriting is possible, if there is no change in the document display state, overwriting to the displayed document is displayed (step S64), and the operation mode is set to the pen mode (step S64). Step S65). If it is not a pen button in step S60, it is further determined whether it is an erase button (step S66). If it is an erase button, it is determined whether the operation mode is set to APL (step S67). If so, the document display state monitoring control is executed (step S68), and it is determined whether overwriting is possible (step S69). If overwriting is possible, overwriting display control is executed (step S70), and the mode is shifted to the erasing mode by the “erase” button (step S71).

  If it is not an input of the delete button in step S66, it is further determined whether the input is an APL button (step S72), and if it is an input of the APL button, it is further determined whether the operation mode is set to APL (step S72). S73). If the operation mode is not set to APL, the “APL” button closes the overwrite window (step S74) and enables the APL program operation (step S75). If the input of the APL button is not input in step S72, the button display state is restored (step S76). Subsequently, it is determined whether or not the input is a setting button (step S77). If the input is a setting button, the “overwrite setting” dialog box is displayed by the “setting” button, and the pen color, thickness, and eraser length are displayed. An input is made (step S78), and the input value in the overwrite setting dialog box is set in the control data (step S79). If it is not the input of the setting button in step S77, it is further determined whether the input is an open button (step S80). If the input is an open button, the “Save” dialog box is displayed by the “Open” button ( Step S81), it is confirmed whether to save the overwrite data. Further, it is determined whether or not to save (step S82). When saving, a “save” dialog box is displayed (step S83), and the data saved in the work overwrite file is saved to the overwrite file (step S84). . Subsequently, an “Open” dialog box is displayed (step S85), and an overwrite file is input (step S86). Subsequently, the APL mode is initialized to the normal display except for the APL button, and the APL button is selected and displayed (step S87). Further, it is determined whether the operation mode is APL (step S88). If the operation mode is not APL, the overwrite window is deleted (step S89), and the operation mode is set to APL (step S90). If the input is not an input of an open button in step S80, it is further determined whether the input is an end button (step S91). If the input is ended, overwriting is ended by an “end” button.

  Next, the overwrite drawing control operation will be described with reference to the flowchart of FIG. Here, the click ON start coordinate is executed as an argument. First, drag start (click ON start) coordinates are stored (step S101). Subsequently, the drag locus mouse data up to the click OFF is input (step S102). After the mouse input, it is determined whether the click is OFF (step S103). If the click is not OFF, the drag trajectory coordinates are saved (step S104), and a line is drawn between the input coordinates and the previous coordinates by the pen color and pen thickness. (Step S105). If the click is OFF in step S103, the upper left origin coordinate, window width, and window height of the document area window are acquired by the I / F provided by the OS using the document area window handle as an argument (step S106). Subsequently, the horizontal scroll box position is obtained by the I / F provided by the OS with the horizontal scroll bar handle as an argument (step S107), and the vertical scroll box position is obtained by the I / F provided by the OS with the vertical scroll bar handle as an argument. Is acquired (step S108). Subsequently, the screen coordinates of the drag trajectory are converted into scroll space coordinates (step S109), the stroke data converted into the scroll space coordinates is saved in an overwrite file (step S110), and the head pointer of the saved stroke block is set to the display stroke. (Step S111).

  Next, the overwriting erasure control operation will be described with reference to the flowchart of FIG. First, the document area window upper left origin coordinate, window width, and window height are acquired by the document area window handle (step S121). Further, the horizontal scroll box position is acquired by the horizontal scroll bar handle (step S122), and the vertical scroll box position is acquired by the vertical scroll bar handle (step S123). Subsequently, mouse data up to the click OFF is input (step S124). Subsequently, it is determined whether or not the click is OFF (step S125). If the click is not OFF, the drawing on the overwrite window in the cursor area with the mouse coordinate as the midpoint and the length of one side as the rubber length is deleted (step S125). Step S126). Further, scroll space coordinates are calculated from the cursor area and converted into the space coordinates (step S127), and the stroke data of the head stroke pointer set in the display stroke is input (step S128). Subsequently, it is searched whether there is a stroke coordinate in the cursor scroll space (step S129), and if there is a stroke coordinate in the cursor scroll space, it is determined whether the stroke is further divided (step S130). When the stroke is divided, the stroke of the overwrite file is divided and stored (step S131), and the head pointer of the divided stroke block is set as the display stroke (step S132). If the stroke is not divided in step S130, it is further determined whether one stroke is erased (step S133). If one stroke is erased, the stroke data in the overwrite file is deleted (step S134), and the stroke pointer is moved from the display stroke. Delete (step S135). If one stroke is not erased in step S133, the erase stroke coordinates of the overwrite file are deleted when the head or tail of the stroke is erased (step S136). Subsequently, search is performed for all the displayed strokes (step S137), and next stroke data is input (step S138).

  Next, the overwriting display control operation will be described with reference to the flowchart of FIG. First, the document area window upper left origin coordinate, window width, and window height are acquired by the document area window handle (step S141). Subsequently, the horizontal scroll box position is acquired by the horizontal scroll bar handle (step S142), and the vertical scroll box position is acquired by the vertical scroll bar handle (step S143). Further, the scroll space coordinates of the document area are calculated (step S144), and the first stroke data is input from the overwrite file (step S145). Thereafter, the immediately preceding coordinate is set to 0xFFFF (step S146), and it is determined whether the stroke coordinate is within the document area scroll space (step S147). If the coordinates are not in the document area scroll space, the immediately preceding coordinates are set to 0xFFFF (step S148). If the coordinates are in the document area scroll space in step S147, it is further determined whether the display stroke is stored (step S149). If not stored, the head pointer in the overwriting file of the stroke block is set to the display stroke and stored. (Step S150). Subsequently, it is determined whether the immediately preceding coordinate is 0xFFFF (step S151). If the immediately preceding coordinate is not 0xFFFF, the stroke space coordinates are converted into screen coordinates (step S152), and the stroke color and thickness are defined between the coordinates. Line drawing is performed (step S153). The immediately preceding coordinates are set as screen coordinates and the coordinates are stored (step S154). Subsequently, it is determined whether one stroke is completed (step S155). If one stroke is completed, it is further determined whether all strokes are completed (step S156). If all strokes are not completed, a search is made as to whether or not the document area being displayed is overwritten with respect to all stroke data of the overwrite file, and the next stroke and roke data are input (step S157).

  Next, the document display state monitoring control operation will be described with reference to the flowchart of FIG. First, the APL window handle acquires the APL window width and height (step S161), and determines whether the sizes are different (step S162). If the APL window width and APL window height of the overwrite file are different from each other, a “window repair” dialog box is displayed (step S163), and it is confirmed whether the window size is to be restored (step S164). Here, if it is the window size, the width and height of the APL window are returned to the overwritten file saved value by the I / F provided by the OS (step S165). Subsequently, the vertical scroll box height is acquired by the vertical scroll bar handle (step S166), and it is determined whether the height of the scroll box has changed (step S167). If the vertical scroll box height of the overwrite file is different, the display magnification (stored height / acquired height) is calculated, the “display magnification setting” dialog box is displayed (step S168), and the magnification change is requested. Further, when there is no change in the size of the APL window and the height of the vertical scroll box, a transparent overwrite window with a full screen size is displayed (step S169), and the mode shifts to the overwrite mode.

(Second Embodiment)
In this embodiment, a specific example for solving the problems in the conventional background art as described above will be described in detail. That is, in a PC conference in which a plurality of PCs are connected to a network and common conference materials are displayed on all the PCs, explanation parts are marked for smooth progress of the meeting, or characters are drawn for supplementary explanation. However, when the conference material is scrolled and the page is changed, the relationship between the display information and the overwriting information is lost, which is meaningless and obstructive. For this reason, the overwriting data is saved and erased. When a conference material that has been overwritten again is displayed, in order to display this overwriting, it is necessary to know where the conference material was overwritten and where it is currently displayed. There is a program (Microsoft Office) that provides an API for acquiring the page number being displayed, display position, display magnification, and the like, but most programs do not provide this function. Therefore, the present invention relates the overwriting and the meeting material position.

  If the display position of the document cannot be acquired, a method of saving the document image at the time of overwriting and saving the image by associating it with the overwriting data is used to store the overwriting and the document in association with each other. After saving, in order to display the conference material that has been overwritten, and to display the overwriting for this, it is necessary to display and search the stored image + overwrite data, and to transmit this image data to another PC. Therefore, the present invention eliminates the time for image search and eliminates time loss due to transmission of image data. Further, when drawing characters (graphics), a method of transmitting screen image data to display the drawing contents on all PCs is used. Since it takes time to transmit the image data, the image data is received behind the voice and the content of the speech cannot be understood. Alternatively, the conference proceeds while confirming whether it has been displayed, which hinders smooth progress of the conference. Therefore, the present invention intends to facilitate a smooth conference by minimizing drawing data. In addition, when erasing characters (graphics), a method of transmitting screen image data to display the erased contents on all PCs is used. Since it takes time to transmit the image data, the image data is received behind the voice and the content of the speech cannot be understood. Alternatively, the conference proceeds while confirming whether it has been erased, which hinders smooth progress of the conference. Therefore, the present invention intends to facilitate a smooth conference by minimizing erased data. Further, if the conference progresses on a PC screen and the minutes on paper, smooth conference progress will be hindered. Therefore, the present invention makes it possible to leave overwriting as minutes. Furthermore, since the conference needs to be held within a limited time, it tends to be simplified and recorded so that it can be understood later. Therefore, the present invention can be transcribed as minutes.

  The system configuration in the second embodiment is the same as that shown in FIGS. Therefore, the duplicate description here is omitted. In particular, in FIG. 1, the tablet PC 1 is connected to a remote value PC terminal in the LAN via a LAN (Local Area Network), a router, and a WAN (Wide Area Network). A PC terminal using a large display-integrated coordinate input device (PDP, liquid crystal rear projector, etc.) as a display is installed in a conference room or the like and is shared by a plurality of people. The tablet PC 2 is connected to other PC terminals from the suburbs by a wireless modem. The tablet PC 3 outputs an image to the projector, displays the screen, and shares the screen. A general PC is less user-friendly than a pen operation, but is operated with a mouse. The scope of rights is the screen unification method in the PC conference at the multipoint with the above configuration. Room conferences using tablet PCs with wireless LAN connections are also effective. In addition, PC operation data is also effective via a network, and voice is effective for a PC conference on a desk using a telephone. The document creation program that creates the conference document is “page information” of the displayed document (“page number” in Microsoft Word, “sheet number” in Excel, “slide number” in PowerPoint, etc.). Registered function), “display magnification” (50%, 100%, etc.), and a display file name acquisition function. This feature is currently provided by Microsoft Word, Excel, and PowerPoint. Further, it is assumed that the document creation program exists in each PC terminal. These programs are registered trademarks of Microsoft Corporation in the US and are commercially available.

Next, a calculation method from screen coordinates to scroll space coordinates will be described with reference to FIG. When the horizontal scroll box is moved by HB length, the document in the document display area is scrolled by WW length (see [1] in FIG. 21). When the vertical scroll box is moved by VB length, the document WH length is scrolled vertically in the document display area (see FIG. 21 [2]). The entire document area displayed by scrolling is a scroll space having a scroll space width (SW) and a scroll space height (SH) (see FIG. 21 [3]).
Since HB: WW = SXL: (X−WX), SXL = (X−WX) × HB / WW (see FIG. 21 [4]).
Since VB: WH = SYL: (Y−WY), SYL = (Y−WY) × VB / WH (see FIG. 21 [5]).
From the screen coordinates (X, Y), the scroll space coordinates (SX, SY) are calculated as follows (see FIG. 21 [6]).
SX = HP + SXL, SY = VP + SYLL

Next, a calculation method from scroll space coordinates to screen coordinates will be described with reference to FIG. Due to the scroll information, the scroll space of the screen display area becomes the upper left origin coordinates (HP, VP), width (HB), and height (H) (see FIG. 22 [1]).
Since HB: WW = (SX−HP): XL, XL = (SX−HP) × WW / HB (see FIG. 22 [2]).
Since VB: WH = (SY−VP): YL, YL = (SY−VP) × WH / VB (see FIG. 22 [3])
The screen coordinates (X, Y) are calculated from the scroll space coordinates (SX, SY) as follows (see FIG. 22 [4]).
X = WX + XL, Y = WY + YL

  The overwriting stroke data in the second embodiment is the same as that shown in FIG. Therefore, the duplicate description here is omitted.

  Next, the PC conference control method will be described with reference to FIG. As shown, a PC screen 200, a document creation program 201 that operates as a standard APL program of Windows (registered trademark of Microsoft Corporation), a PC conference control program 202, an initialization control unit 204, a display monitoring control unit 205, an overwrite The display monitor control unit 205, the overwrite control unit 206, and the network control unit 207 are independently operated.

  The initialization control unit 204 initializes the PC conference control program, inputs the conference participation PC, activates the display monitoring control unit 205, the overwrite control unit 206, and the network control unit 207, and starts the PC conference. The display monitoring control unit 205 detects the conference material file displayed by the document creation program, and distributes the conference file to the non-operation right PC. Further, the display position, size, vertical scroll box position, and horizontal scroll box position of the document creation program window are monitored, and if there is a change, the change is notified to the non-operation right PC. The overwrite control unit 206 draws a mark or minutes on the conference material by handwriting operation and saves the drawing data in an overwrite file. The network control unit 207 receives and controls packet data transmitted from other conference participation PCs. (Transmission of packet data is performed by each control unit as needed.

  The control data 208 is input / output by the initialization control 204, the display monitoring control unit 205, the overwrite control unit 206, and the network control unit 207 to control the PC conference. The conference file 209 is conference material displayed by the document creation program and is automatically distributed from the operation right PC in addition to the operation right PC. The overwrite file 210 stores overwrite data drawn at the PC conference.

  Next, the PC conference control data will be described with reference to FIG. Packet data 211 indicates data transmitted / received via the network (LAN 10), and control data 208 indicates data input / output by the network control unit 207, the display monitoring control unit 205, and the overwrite control unit 206 that operate independently. . The “conference start packet” is created by the initialization control unit that hosts the conference and transmitted to the participating PCs to start the conference. The conference file packet 213 is created by the display monitoring control 205 of the PC that hosts the conference, distributed to the participating PCs, starts the document creation program, and displays it as conference material. The PC screen unification packet 214 is used by the display supervisory control unit with the operation right to monitor changes in the window display position, size, vertical scroll box position, and horizontal scroll box position of the document creation program. To do. The overwrite packet 215 is transmitted when the overwrite control unit having the operation right overwrites the conference material and displays the overwrite on another PC. The overwrite erase packet 216 is transmitted when the overwrite control with the operation right is overwritten and erases the overwrite of another PC. The operation right packet 217 is used to turn over the conference material page, request the overwriting operation right to the host PC, and notify the transfer of the operation right. The conference is ended by the host PC by the conference end packet 211 and the absence is notified by the participating PC. The PC conference is controlled by the conference control data 219. The current display state is indicated by the PC screen unified control data 220. Overwriting is controlled by overwriting control data 221.

  Next, a conference hosting start method will be described with reference to FIG. The PC conference control program 202 is activated by means provided by the OS, such as double-clicking on a desktop icon, and the “conference selection toolbar” is displayed. When the “sponsor” button 203 is pressed, the “conference partner dialog box” is displayed (see FIG. 25 [1]). The network address of the conference partner is input and registered (see FIG. 25 [3]). The network address of the registered conference partner is displayed (see FIG. 25 [4]). Drag the network address to delete it. When the setting of the conference partner is completed (OK), a “conference start toolbar” is displayed (see FIG. 25 [5]). The “overwrite toolbar” is displayed by the “start” button, and the conference is started (see FIG. 25 [6]). The network address of the PC participating in the conference is notified to the conference participating PC by the conference start packet 212 (see FIG. 25 [7]). The conference material file path being displayed is acquired from the title bar of the APL window displaying the conference material, the file data is input, and the conference file packet 213 is distributed to the conference participation PCs (see FIG. 25 [8]). The upper left origin coordinate, width, height, horizontal scroll box position, and vertical scroll box position of the APL window for displaying the conference material are acquired, and the screen display of the conference participating PCs is unified by the PC screen unification packet 214 (FIG. 25 [9 ]reference).

  Next, a conference participation start method will be described with reference to FIG. The PC conference control program 202 is activated by means provided by the OS, such as double-clicking on the desktop icon, and the “conference selection toolbar” is displayed (see FIG. 26 [1]). The “participation” button displays a “conference connection dialog box”, waits for reception of the conference start packet, and erases it upon reception (see FIG. 26 [2]). Conference member information is stored in the conference control data 219 (see FIG. 26 [3]). Upon reception of the conference file packet 213, a file is created, a file path is passed, a program for displaying conference material is started, and the conference material is displayed (see FIG. 26 [4]). With the PC screen unified packet 214, the display of the APL window for displaying the conference is corrected to the upper left origin coordinates, width, and height, and the position is corrected to the horizontal scroll box position and vertical scroll box position (see FIG. 26 [5]). The operation right toolbar is displayed (see FIG. 26 [6]).

  Next, the PC screen unification method will be described with reference to FIG. Monitor and change the upper left origin coordinates (X, Y), width (W), height (H), horizontal scroll box position (PH), and vertical scroll box position (PV) of the window displayed on the screen. If there is, the PC screen unified packet 214 is created and transmitted to the conference participation PC (see FIG. 27 [1]). Upon receiving the PC screen unified packet, the conference participant PC corrects the display of the window to the upper left origin coordinates (X, Y), width (W), height (H), horizontal scroll box position (PH), vertical scroll box position ( The scroll box is moved to (PV) (see FIG. 27 [2]). As a result, the PC screen display is kept the same as the operation right PC.

  Next, the overwrite operation will be described with reference to FIG. The handwritten character is drawn by the “pen” button on the overwrite toolbar, and the handwritten character is erased by the “erase” button (see FIG. 28 [1]). The “APL” button allows normal program operation. At the time of overwriting and erasing, a transparent window having a full screen size (the background is transparently displayed) is created and displayed (see FIG. 28 [2]). At the time of a character drawing operation with the pen (mouse), lines are sequentially drawn on the transparent window between the drag coordinates in the color and thickness set for the pen. The drawing coordinates (drag coordinates at the time of overwriting operation) are converted into scroll space coordinates and saved as stroke data in the overwriting file (see FIG. 28 [3]). The drawing coordinates are transmitted to the conference participation PC for each stroke by the overwrite packet 215 (see FIG. 28 [4]). The PC that has received the overwrite packet 215 draws a line between the drawing coordinates sequentially with the pen color and the pen thickness (see FIG. 28 [5]). The drawing coordinates are converted into scroll space coordinates and stored in the overwrite file 210 as stroke data (see FIG. 28 [6]).

  Next, the overwrite redrawing method will be described with reference to FIG. Changes in the horizontal scroll box position, vertical scroll box position, window display upper left origin coordinate, width, and height are monitored, and if there is a change, a PC screen unified packet 214 is transmitted (see FIG. 29 [1]). When the display is changed, the scroll space displayed on the screen is calculated from the horizontal scroll box position and the vertical scroll box position, the overwrite data is searched from the overwrite file to the same space, and the scroll space coordinates are converted to the screen coordinates and displayed ( See FIG. 29 [2]). Upon receiving the PC screen unified packet 214, the conference participation terminal corrects the display to the window position, width, and height based on the packet information, moves the scroll box to the vertical scroll box position, the horizontal scroll box position, the horizontal scroll box position, and the vertical scroll. The scroll space displayed on the screen is calculated from the box position, overwritten data is searched from the overwrite file to the same space, and the scroll space coordinates are converted into screen coordinates and displayed (see FIG. 29 [3]).

  Next, the operation right transfer method will be described with reference to FIGS. 30-1 and 30-2. Here, the PC operation right (page turning of conference material, scroll display, overwriting, etc.) is given to the host PC at the start of the conference. The participating PCs request an operating right from the host PC by using the “operating right” button on the operating right toolbar (see FIG. 30-1 [1]). The operation right request by the “operation right (request) packet” is transmitted to the hosting PC (see FIG. 30-1 [2]). When the host PC receives the operation right request packet, an “operation right dialog box” is displayed (see FIG. 30-1 [3]). The operation right is given by the “permit” button, and the operation right request is rejected by the “reject” button. When the host PC permits the operation right, an “operation right (movement) packet” is transmitted to all participating PCs (see FIG. 30-1 [4]). When the operation right (transfer) packet is received, an “operation right transfer dialog box” is displayed to notify the operation right transfer (see FIG. 30-1 [5]). When the operation right is acquired, the display is changed from the operation right toolbar to the overwrite toolbar, and when the operation right is lost, the display is changed from the overwrite toolbar to the operation right toolbar (see FIG. 30-1 [6]). When the operation right request is rejected by the “reject” button, an “operation right (rejection) packet” is transmitted to the operation right request PC (see FIG. 30-2 [7]). When the operation right (rejection) packet is received, an “operation right rejection dialog box” is displayed (see FIG. 30-2 [8]).

  Next, the overwrite editing method will be described with reference to FIGS. 31-1 and 31-2. When the PC conference ends, a save confirmation dialog box for handwritten characters (graphics) overwritten during the PC conference is displayed (see FIG. 31-1 [1]). The overwrite data is saved in the designated overwrite file (see FIG. 31-1 [2]). The overwritten conference material is activated and displayed on the program that created the conference material (see FIG. 31-1 [3]). Starts the overwrite editing program, displays a dialog box to open, and inputs an overwrite file to the conference material (see FIG. 31-1 [4]). Displays the overwrite editing toolbar, obtains the upper left origin coordinate, width, height, horizontal scroll box position, and vertical scroll box position of the window displaying the conference material, calculates the scroll space on the screen, overwrites the overwrite to this space file (See FIG. 31-1 [5]). “Pen” erases and edits additional drawing, and “Erase” erases and edits. Save the edited override.

  Next, overwriting setting will be described with reference to FIG. From “Thickness”, the thickness of the line at the time of character drawing is selected (see FIG. 32 [1]). From “Color”, the color of the line at the time of character drawing is selected (see FIG. 32 [2]). The selected color and thickness are displayed in the viewer (see FIG. 32 [3]). Click the eraser (pen touch) and drag the handle displayed to select the size of the eraser cursor (see FIG. 32 [4]).

  Next, the initialization control operation will be described with reference to the flowchart of FIG. First, the conference control data is cleared to 0, the network address of the own PC is set (step S171), and the PC screen unification control data is cleared to 0 (step S172). Subsequently, the overwrite control data is set to 0 clear, pen color, pen thickness, and default value for the eraser cursor (step S173). Further, a conference selection toolbar is displayed (step S174), and set while the toolbar is not controlled (step S175). Mouse data from a pen down (mouse button ON) to a pen up (mouse button OFF) on the conference selection toolbar is input (step S176). It is determined whether the tool bar is not being controlled (step S177). If the tool bar is not being controlled, it is set during the tool bar control by pen-down (step S178). Further, the button of the mouse coordinate is selected and displayed (step S179), and the click button information is saved (step S180). The button has two display forms, a normal display and a selection display (inverted display, etc.). If the toolbar is not being controlled in step S177, it is further determined whether the mouse button is OFF (step S181). If the mouse button is OFF, it is further determined whether the coordinates are on the click button (step S182). If the coordinates are not on the click button, the tool bar control is set to OFF (step S183). If the coordinates when the mouse button is OFF are different from the click button, the click button is returned to the normal display and the button function is not executed. (Step S184). If the coordinates are on the click button in step S182, the conference selection toolbar is deleted (step S185), and it is determined whether the click button is hosted (step S186). If the click button is sponsored here, “conference sponsoring control” is executed by clicking the “sponsor” button (step S187). If the click button is not sponsored in step S186, it is further determined whether the click button is participating (step S188). If it is participating, “conference participation control” is executed by clicking the “join” button (step S189). .

  Next, the conference sponsoring control operation will be described with reference to the flowchart of FIG. First, the conference partner dialog box is displayed (step S191), and the conference partner network address is input (step S192). Subsequently, the host PC network address and the operation right PC network address are set as the own PC network address in the conference control data, the operation right is set, and the input conference partner network address is set as the participating PC network address (step S193). Further, a conference start toolbar is displayed (step S194), and set while the toolbar is not controlled (step S195). Mouse data from the pen down (mouse button ON) to the pen up (mouse button OFF) on the conference start toolbar is input (step S196). Subsequently, it is determined whether the tool bar is not being controlled (step S197). If the tool bar is not being controlled, the tool is set to be in the tool bar control by pen-down (step S198), and the mouse coordinate button is selected and displayed (step S199). ), The click button information is saved (step S200). The button has two display forms, a normal display and a selection display (inverted display, etc.). If the toolbar is not being controlled in step S197, it is further determined whether the mouse button is OFF (step S201). If the mouse button is OFF, it is further determined whether the coordinates are on the click button (step S202). If the coordinates are not on the click button, the setting is made while the tool bar is not controlled (step S203). If the coordinates when the mouse button is OFF differ from the click button, the click button is returned to the normal display and the button function is not executed. (Step S204). If the coordinates are on the click button in step S202, the conference start toolbar is deleted (step S205), and it is determined whether the click button is started (step S206). If it is a start click button here, the “start” button activates “network control”, starts packet data reception (step S207), activates “display monitoring control”, and starts normal monitoring of the window display. (Step S208). Furthermore, “overwrite control” is activated, an overwrite toolbar (PC with operation right) is displayed (step S209), a conference start packet is created from the conference control data, and transmitted to all participating PCs (step S210).

  Next, the conference participation control operation will be described with reference to the flowchart of FIG. First, a conference connection dialog box is displayed and waiting for connection by the host PC (step S211). Thereafter, “network control” is activated and packet data reception is started (step S212). Subsequently, it waits for the network control to receive the conference start packet and notify the conference start packet (step S213). If the conference start packet is received, the conference connection dialog box is deleted by receiving the conference start packet (step S214). Subsequently, “display monitoring control” is activated, window display normal monitoring is started (step S215), “overwrite control” is activated, and an operation right toolbar (PC without operation right) is displayed (step S216).

  Next, the display monitoring control operation will be described with reference to the flowchart of FIG. First, it is determined whether it is a host PC (step S221), and if it is a host PC, the APL window information being displayed (the window in which the APL title is displayed) is acquired (step S222). Subsequently, it is determined whether the APL window is displayed (step S223). If the APL window is displayed, it is determined whether the display is a conference file (step S224), and the file name is set in the window caption information. Wait for it. Subsequently, the path of the file name of the caption information is searched, the conference file is input (step S225), the conference file data and the conference file name are set in the “conference file packet”, and transmitted to all participating PCs (step S226). Subsequently, it is determined whether it is an end notification (step S227). That is, the display monitoring control is ended by receiving a conference end packet from the host PC or by an end notification using the toolbar “end” button. If it is not an end notification, it is determined whether there is an operation right (step S228), and APL window information (upper left origin coordinate, width, height) is acquired (step S229). Further, the horizontal scroll box position is acquired (step S230), and the vertical scroll box position is acquired (step S231). Subsequently, it is determined whether or not there is a change (step S232). If there is a change, if the acquired APL window information and scroll box position are different from the PC screen unified control data, a “PC screen unified packet” is created based on the obtained value. Transmit to all other PCs (step S233). Further, the acquired value is set in the PC screen unified control data (step S234), and waits for monitoring the display state of the APL window periodically (every 10 ms, every 100 ms, etc.) (step S235).

  Next, the network control operation will be described with reference to the flowchart of FIG. The network control is ended by receiving a conference end packet from the host PC or by an end notification using a toolbar “end” button (step S241). If it is not an end notification, it waits for packet data to be received (step S242). If packet data is received, it is determined whether it is a conference start packet (step S243). If it is a conference start packet, upon receiving the “conference start packet”, the host PC, the operation right PC, the participating PC network address, the number of participating PCs are set in the conference control data, and no operation right is set (step S244), and the conference starts The packet reception is notified to the “conference participation control” (step S245). If it is not a conference start packet in step S243, it is further determined whether it is a conference file packet (step S246). If it is a conference file packet, a “conference file packet” is received to create a conference file and save the conference file data. The conference file name is set in the conference control data (step S247). Subsequently, the conference file display program is activated by the created conference file (step S248). If it is not a conference file packet in step S246, it is further determined whether the packet is a PC screen unified packet (step S249). "Is executed (step S250). If the packet is not a PC screen unified packet in step S249, it is further determined whether it is an overwrite packet (step S251). ). If it is not an overwrite packet in step S251, it is further determined whether it is an overwrite erase packet (step S253). Step S254). If it is not an overwrite erase packet in step S253, it is further determined whether it is an operation right packet (step S255), and if it is an operation right packet, "operation right packet reception control" is executed using the "operation right packet" ( Step S256). If it is not the operation right packet in step S255, it is further determined whether it is a conference end packet (step S257), and if it is a conference end packet, it is further determined whether the host PC is ended (step S258). If the host PC is not ended here, the participation PC network address of the conference leaving PC is deleted from the conference control data by receiving the “conference end packet” from other than the host PC (step S259). If the host PC is ended in step S258, the display monitoring control and the overwrite control are notified and ended by receiving the “conference end packet” from the host PC (step S260).

  Next, the PC screen unified packet reception control operation will be described with reference to the flowchart of FIG. First, in order to change the display, the overwrite window is temporarily deleted (step S261). Thereafter, it is determined whether or not the window origin coordinates are changed (step S262). If the window origin coordinates are changed, the PC screen unification packet and the PC screen unification control data window upper left origin coordinates are compared. The APL window is moved to the packet “window upper left origin coordinates” (step S263). Subsequently, it is determined whether or not the width / height has been changed (step S264). If the width / height has been changed, if the window width or the window height is different, the PC screen unified packet “window width”, “window” The window size is changed to “Height” (step S265). Subsequently, it is determined whether or not the horizontal scroll box position has been changed (step S266). If the horizontal scroll box position has changed, if the horizontal scroll box position is different, the PC screen unified packet “horizontal scroll box position” is horizontal. The scroll box is moved (step S267). Subsequently, it is determined whether or not the vertical scroll box position has been changed (step S268). If the vertical scroll box position is changed, if the vertical scroll box position is different, the PC screen unified packet “vertical scroll box position” is vertical. The scroll box is moved (step S269). Subsequently, PC screen unification control data is set (step S270), "overwrite display control" is executed, and overwriting to the document whose display has been changed is redrawn (step S271).

  Next, the overwrite packet reception control operation will be described with reference to the flowchart of FIG. First, the drawing number is set to 0 (step S281), and a line is drawn between the drawing coordinates with the pen color and the pen thickness (step S282). Thereafter, the drawing number is incremented by 1 (step S283), and it is determined whether the drawing number <the drawing coordinate number (step S284). , Width, height) is acquired (step S285). Subsequently, horizontal scroll bar information (scroll box position and width) is acquired (step S286), and vertical scroll bar information (scroll box position and width) is acquired (step S287). Further, the drawing coordinates (screen coordinates) are converted into scroll space coordinates (step S288) and saved as stroke data in an overwrite file (step S289).

  Next, the overwrite erasure packet reception control operation will be described with reference to the flowchart of FIG. First, the number of erases is set to 0 (step S291), and a rectangular area consisting of eraser cursor length with the erase coordinate at the center and the length of one side is set to a transparent color (step S292). The overwriting of the rectangular area is erased and the background screen is displayed. Subsequently, the erase number is incremented by 1 (step S293), and it is determined whether or not the erase number <the erase coordinate number (step S294). If the erase number <the erase coordinate number, the window information (upper left origin) of the document display area is determined. The coordinates, width, and height are acquired (step S295). Subsequently, horizontal scroll bar information (scroll box position, width) is acquired (step S296), and further vertical scroll bar information (scroll box position, width) is acquired (step S297). Subsequently, the erase coordinates are converted into scroll space coordinates (step S298), and the upper left origin coordinates, width, and height of the cursor scroll space rectangular area consisting of the eraser cursor length with the calculated one at the center and the length of one side are set. Calculate (step S299). Further, stroke data is input from the overwrite file (step S300), and it is determined whether the input stroke coordinates are within the cursor scroll space rectangular area (step S301). If it is within the cursor scroll space rectangular area, it is further determined whether the stroke is divided (step S302). If the stroke is divided here, the stroke is divided when the middle of the stroke is deleted (step S303). Subsequently, the latter half of the divided stroke is saved as a new stroke in the overwrite file (step S304), and the latter half of the input stroke data is deleted (step S305). If the stroke is not divided in step S302, the erase coordinates of the input stroke data are deleted (step S306). Subsequently, it is determined whether all stroke coordinates have been searched (step S307). If all stroke coordinates have been searched, the stroke data in the overwrite file is replaced with the input stroke data updated upon completion of all stroke coordinates of the input stroke data. (Step S308). If all stroke coordinates are deleted, the stroke data is deleted from the overwrite file. Subsequently, it is determined whether all strokes have been searched (step S309). That is, it is executed for all stroke data of the overwrite file. And it performs with respect to all the deletion coordinates (step S310).

  Next, the operation right packet reception control operation will be described with reference to the flowchart of FIG. First, it is determined whether the control code is a request (step S311), and if it is a request, the operation right (request) packet is transmitted to the host PC and an operation right request dialog box is displayed (step S312). Subsequently, it is determined whether the operation right is permitted or rejected (step S313). If it is permitted, the operation right PC network address of the conference control data is changed to the requested PC network address by permission of the operation right ( In step S314), the operation right (movement) packet is transmitted to all participating PCs (step S315). Subsequently, the presence / absence of the operation right is determined (step S316). If the operation right is present, if the host PC has the current operation right, the operation right transfer notification is sent to the “overwrite control” (step S317). No right is set (step S318). If the operation right is rejected in step S313, the operation right (rejection) packet is transmitted to the operation right request PC by rejecting the operation right (step S319). If it is not the requested control code in step S311, it is further determined whether or not the control code is rejected (step S320). The rejection of the right is notified (step S321). If it is not a rejection control code in step S320, it is further determined whether the control code is a movement control code (step S322). The PC network address is changed to the requested PC network address (step S323). Subsequently, it is determined whether the operation right request PC is received (step S324). When the operation right request PC receives the operation right (movement) packet, the operation right permission is notified to the “overwrite control” (step S325). An operation right is set (step S326). If it is not the operation right PC in step S324, it is further determined whether the operation right is present (step S327). If the operation right is present, the operation right transfer notification is sent to the “overwrite control” (step S328). None is set (step S329).

  Next, the overwrite control operation will be described with reference to the flowcharts of FIGS. 42-1 and 42-2. First, an overwrite file is created and initialized (total number of strokes = 0) (step S331), and the overwrite file name is set in the overwrite control data (step S332). Subsequently, it is determined whether or not there is an operation right (step S333). If there is no operation right, an operation right toolbar is displayed (step S334), a transparent window of a full screen size is displayed, and operations other than the operation right toolbar are disabled. (Step S335). If there is an operation right in step S333, the overwrite toolbar is displayed (step S336), the overwrite mode is set to APL (step S337), the overwrite mode is set to APL, and the APL button of the overwrite toolbar is selected and displayed (step S338). . Subsequently, the overwriting control is ended by receiving a conference end packet from the host PC, or by an end notification by the “end” button of the overwriting toolbar or the operation right toolbar (step S339). If it is not an end notification, it is determined whether it is an operation right transfer notification (step S340), and the overwrite toolbar is deleted by the operation right transfer notification from the operation right packet reception control (step S341). Subsequently, it is determined whether the APL overwrite mode is set (step S342). If the APL overwrite mode is set, the overwrite window displayed in the drawing / erasing mode is deleted (step S343). Further, the operation right toolbar is displayed by the operation right transfer notification (step S344), the overwrite window is displayed, and operations other than the operation right toolbar operation are invalidated (step S345). Subsequently, only mouse data is input to the overwrite toolbar, and if the overwrite mode is “draw” or “erase”, all mouse data is input (step S346). The mouse data is input to the operation authority toolbar, and “operation authority toolbar control” is executed (step S346). Subsequently, it is determined whether or not there is an operation right (step S347). If there is no operation right, “operation right toolbar control” is executed by inputting mouse data on the operation right toolbar (step S348). When the overwrite mode is “APL”, if there is an operation right in step S347, it is further determined whether the coordinates are the overwrite toolbar coordinates (step S349). If the coordinates are the overwrite toolbar coordinates, the mouse data is input on the overwrite toolbar. Then, “overwrite toolbar control” is executed (step S350). If it is not the overwrite toolbar coordinates in step S349, it is further determined whether the overwrite mode is drawing or erasing (step S351). If it is the drawing overwrite mode, the overwrite mode is " In the case of “drawing”, “overwrite drawing control” is executed (step S352). If the overwrite mode is erase in step S351, when the mouse data outside the overwrite toolbar is input and the overwrite mode is “erase”, “overwrite erase control” is executed (step S353). Subsequently, the presence / absence of the operation right is determined (step S354). When there is no operation right, the displayed operation right toolbar is deleted (step S355), and the overwrite window is deleted (step S356). If there is an operation right in step S354, the overwrite toolbar is deleted (step S357), and it is determined whether it is in the APL overwrite mode (step S358). If it is the APL overwrite mode, the overwrite window is deleted (step S359). ). Then, a save confirmation dialog box is displayed (step S360), and it is confirmed whether to save the overwrite data (step S361). In the case of saving, the overwriting file data is copied and saved to the designated file (step S362).

  Next, the overwrite toolbar control operation will be described with reference to the flowchart of FIG. Here, the mouse data when the mouse button is ON (pen touch) is executed as an argument. First, the mouse button ON coordinate button is selected and displayed, the others are displayed normally (step S371), and mouse data up to the mouse button OFF (pen-up) is input (step S372). Subsequently, it is determined whether or not mouse data is input (step S373). If the coordinates when the mouse button is OFF are not on the click button, the button function is not executed. Subsequently, it is determined whether the mouse button is OFF (step S374). If the mouse button is OFF, it is further determined whether the coordinates are on the click button (step S375), and the “pen” button is selected in the APL mode. If it is, the “overwrite display control” is executed, and overwriting to the currently displayed document is retrieved from the overwrite file and redrawn. Subsequently, it is determined whether the click button is a pen (step S376), and if it is a pen, it is further determined whether the overwrite mode is APL (step S377). When the “erase” button is selected in the APL mode, “overwrite display control” is executed, overwriting to the currently displayed document is searched from the overwriting file, redrawing is performed (step S378), and the overwriting mode is set to drawing. (Step S379). If it is not a pen click button in step S376, it is further determined whether it is an erase click button (step S380), and if it is an erase click button, it is further determined whether it is in the APL overwrite mode (step S381). In the APL overwrite mode, “overwrite display control” is executed, overwriting to the currently displayed document is retrieved from the overwrite file, redrawn (step S382), and the overwrite mode is set to erase (step S383). ). If it is not the APL overwrite mode in step S381, it is further determined whether the button is an APL click button (step S384). If it is an APL click button, the "APL" button deletes the overwrite window, returns it to a state where normal program operation is possible (step S385), and sets the APL overwrite mode (step S386). If it is not an APL click button in step S384, it is further determined whether it is a setting click button (step S387). If it is a setting click button, the “setting” button displays an overwrite setting dialog box, and the pen color Then, the thickness and eraser cursor length are input (step S388), and the overwrite setting dialog box input value is set in the overwrite control data (step S389). If it is not the set click button in step S387, the “end” button creates a conference end packet, transmits it to all other PCs (step S390), and notifies the network control, overwrite control, and display monitoring control of the end ( Step S391). If the coordinates are not on the click button in step S375, the overwrite mode button is selected and displayed (step S392).

  Next, the operation right toolbar control operation will be described with reference to the flowchart of FIG. Here, the mouse data when the mouse button is ON (pen touch) is executed as an argument. First, the mouse button ON coordinate button is selected and displayed, the others are displayed normally (step S401), click button information is saved (step S402), and mouse data up to the mouse button OFF (pen-up) is input (step S403). ). It is determined whether or not the mouse button is OFF (step S404). If the mouse button is OFF, the click button is normally displayed (step S405). Subsequently, it is determined whether the coordinates are on the click button (step S406). Here, if the coordinates when the mouse button is OFF are not on the click button, the button function is not executed. Subsequently, it is determined whether the button is an operation right click button (step S407). If it is an operation right click button, it is further determined whether it is a host PC (step S408). In the case of the host PC, the host PC acquires the operation right and transmits an operation right (movement) packet to all participating PCs by the “operation right” button (step S409). If the PC is not the host PC in step S408, the participating PC transmits an operation right (request) packet to the host PC and requests the operation right using the “operation right” button (step S410). Subsequently, it waits for network control to receive the operation right (permission) packet and notify the operation right permission (step S411), and further waits for the network control to receive the operation right (rejection) packet and notify the operation right rejection (step S411). Step S412). When the operation right request is rejected, an operation right rejection dialog box is displayed (step S413). The dialog box automatically closes after a few seconds. If the operation right request is permitted in step S411, an operation right permission dialog box is displayed (step S414). The dialog box automatically closes after a few seconds. Subsequently, the operation right toolbar is deleted (step S415), the overwrite window is deleted (step S416), and the overwrite toolbar is displayed (step S417). Further, the overwrite mode is set to APL (step S418), and the overwrite toolbar “APL” button is selected and displayed (step S419). If it is ended in step S407, a conference end packet is created and transmitted to all other PCs by the “end” button (step S420), and the end is notified to network control, overwriting control, and display monitoring control (step S421). .

  Next, the overwrite display control operation will be described with reference to the flowchart of FIG. First, window information (upper left origin coordinates, width, height) of the document display area is acquired (step S431), and horizontal scroll bar information (scroll box position, width) is acquired (step S432). Further, vertical scroll bar information (scroll box position and width) is acquired (step S433), and scroll space coordinates of the document display area are calculated (step S434). Further, a transparent window having a full screen size is displayed (step S435), and stroke data is input in units of strokes from the overwrite file (step S436). Subsequently, the immediately preceding coordinate is set to 0xFFFF (step S437), and it is determined whether the stroke coordinate is a document display area (step S438). If the stroke coordinates are not the document display area, the immediately preceding coordinates are set to 0xFFFF (step S439). If it is the stroke coordinate of the document display area in step S438, the stroke coordinate is converted to the screen coordinate (step S440). Subsequently, it is determined whether or not the immediately preceding coordinate is 0xFFFF (step S441). If the immediately preceding coordinate is not 0xFFFF, a line is drawn between the immediately preceding coordinate and the screen coordinate with the stroke color and stroke thickness (step S442). Further, the screen coordinates are stored as the previous coordinates (step S443). Subsequently, it is determined whether one stroke is completed (step S444). If one stroke is completed, it is further determined whether the previous stroke is completed (step S445). If all strokes have not been completed, the entire overwritten file stroke is searched (step S446).

  Next, the overwrite drawing control operation will be described with reference to the flowchart of FIG. Here, the mouse data when the mouse button is ON (pen down) is executed as an argument. First, the mouse coordinates are stored in the drawing coordinate data, the number of drawing coordinates is set to “1” (step S451), and mouse data up to the mouse button OFF (pen-up) is input (step S452). Subsequently, it is determined whether or not the mouse button is OFF (step S453). If the mouse button is not OFF, the line between the previous coordinates and the current coordinates is drawn with the pen color and pen thickness set in the overwrite control data ( In step S454), the input mouse coordinates are stored in the drawing coordinate data (step S455). If the mouse button is OFF in step S453, an overwrite packet is created from the drawing coordinate data and transmitted to all other PCs (step S456), and window information (upper left origin coordinates, width, height) of the document display area is acquired. (Step S457). Further, horizontal scroll bar information (scroll box position and width) is acquired (step S458), and vertical scroll bar information (scroll box position and width) is acquired (step S459). Subsequently, the drawing coordinates are converted into scroll space coordinates (step S460), and the stroke data is stored in an overwrite file (step S461).

  Next, the overwrite erasure control flow will be described with reference to the flowchart of FIG. Here, the mouse data when the mouse button is ON (pen down) is executed as an argument. First, the mouse coordinates are stored in the erase coordinate data (step S471), and the erase coordinate number is set to “1”. Subsequently, a rectangular area consisting of the mouse coordinate center and the length of one side and the eraser cursor length is set to a transparent color (step S472). This erases the overwrite. Subsequently, mouse data up to the mouse button OFF (pen-up) is input (step S473). Further, it is determined whether or not the mouse button is turned off (step S474). If the mouse button is not turned off, a rectangular area consisting of the mouse coordinates and the length of one side eraser cursor is set to a transparent color (step S475). The mouse coordinates are stored as erase coordinates in the erase coordinate data (step S476). If the mouse button is OFF in step S473, an overwrite erase packet is created from the erase coordinate data and transmitted to all other PCs (step S477), and window information (upper left origin coordinates, width, height) of the document display area is acquired. (Step S478). Further, horizontal scroll bar information (scroll box position, width) is acquired (step S479), and vertical scroll bar information (scroll box position, width) is acquired (step S480). Subsequently, the erase coordinates are converted into scroll space coordinates (step S481), and the upper left origin coordinates, width, and height of the cursor scroll space rectangular area consisting of the center of the calculated coordinates and the length of one side of the eraser cursor are set. Calculate (step S482). Further, stroke data is input from the overwrite file (step S483). Subsequently, it is determined whether the input stroke coordinates are within the cursor scroll space (step S484). Further, it is determined whether or not the stroke is divided (step S485). If the stroke is divided, the stroke is divided when the middle of the stroke is deleted (step S486). Further, the latter half of the divided stroke is stored in the overwrite file as a new stroke (step S487), and the latter half of the input stroke data is deleted (step S488). If the stroke is not divided in step S485, the erased coordinates of the input stroke data are deleted (step S489). Subsequently, it is determined whether all stroke coordinates have been searched (step S490). If all stroke coordinates have been searched, the stroke data in the overwrite file is replaced with the input stroke data updated upon completion of all stroke coordinates of the input stroke data. . When all the stroke coordinates are deleted, the stroke data of the overwrite file is deleted (step S491). Further, it is executed for all stroke data of the overwrite file (step S492). Further, the process is executed for all erased coordinates (step S493).

  Next, the overwrite editing control operation will be described with reference to the flowchart of FIG. This overwriting editing program exists separately from the PC conference control program, and is used for overwriting display and editing. First, when the overwrite editing program is started by means provided by the OS such as double-clicking on a desktop icon, an “open dialog box” is displayed (step S501). If not cancelled, the overwrite file designated by the open dialog box is input (step S503). Further, the overwrite file name, default pen color, pen thickness, eraser cursor length are set in the overwrite control data (step S504), the overwrite editing toolbar is displayed (step S505), and the overwrite editing mode is set to APL (step S504). S506). Further, the overwrite editing toolbar “APL” button is selected and displayed (step S507). Overwrite editing toolbar operation mouse data is input in the “APL” mode, and all mouse data is input in the “draw” and “erase” modes (step S508). Subsequently, it is determined whether the coordinates are overwrite editing toolbar coordinates (step S509). If not the overwrite editing toolbar coordinates, it is further determined whether the overwrite editing mode is drawing (step S510). Here, in the drawing overwrite editing mode, in the drawing mode, if the input mouse coordinates are coordinates outside the overwrite editing toolbar, “overwrite drawing control” is executed (step S511). If the drawing edit mode is not the overwrite edit mode in step S510, "overwrite erase control" is executed when the input mouse coordinates are outside the overwrite edit toolbar in the delete mode (step S512). If the coordinate is an overwrite editing toolbar coordinate in step S509, if the mouse coordinate is on the overwrite editing toolbar, "overwrite editing toolbar control" is executed (step S513). Subsequently, it is determined whether or not the process has been completed (step S514). If the process has been completed, the overwrite editing tool bar is deleted using the “end” button of the overwrite editing tool bar (step S515). Subsequently, it is determined whether or not the overwrite editing mode is APL (step S516). If the overwrite editing mode is not APL, if the overwrite display is being performed, the overwrite window is deleted (step S517). Further, an overwrite is saved or a save confirmation dialog box is displayed (step S518). Subsequently, it is determined whether or not to save (step S519), and if so, the overwrite data is saved to the designated overwrite file (step S520). Here, the overwrite drawing control and the overwrite erasure control are the same as the PC conference control, and thus the description thereof is omitted.

  Next, the overwrite editing toolbar control operation will be described with reference to the flowchart of FIG. Here, the mouse data when the mouse button is ON (pen touch) is executed as an argument. First, the mouse button ON coordinate button is selected and displayed, and the others are displayed normally (step S521). Subsequently, the click button information is stored (step S522), and mouse data up to the mouse button OFF (pen-up) is input (step S523). Subsequently, it is determined whether or not the mouse button is OFF (step S524). If the mouse button is OFF, the button function is not executed if the coordinates when the mouse button is OFF are not on the click button (step S525). Subsequently, it is determined whether the click button is a pen (step S526). If it is a pen click button, it is further determined whether the overwrite editing mode is APL (step S527), and the "pen" button in the APL mode. Is selected, “overwrite display control” is executed, overwriting to the currently displayed document is searched from the overwrite file, redrawing is performed (step S528), and the overwrite editing mode is set to drawing (step S529). If it is not a pen click button in step S526, it is determined whether it is an erase click button (step S530), and if it is an erase click button, it is determined whether the overwrite editing mode is APL (step S531). If the overwrite editing mode is APL, when the “erase” button is selected in the APL mode, “overwrite display control” is executed, and overwriting to the currently displayed document is retrieved from the overwrite file and redrawn (step In step S532, the overwriting edit mode is set to delete (step S533). If it is not the delete click button in step S530, it is further determined whether the click button is APL (step S534). If the click button is APL, the "APL" button deletes the overwrite window and normal program operation is performed. (Step S535), and the overwrite editing mode is set to APL (step S536). If the click button is not APL in step S534, it is further determined whether or not the click button is set (step S537). If the click button is set here, the overwrite setting dialog box is displayed by the “setting” button, the pen color, the pen thickness, and the eraser cursor length are input (step S538), and the overwrite setting dialog box input value is overwritten. Data is set (step S539), the overwrite edit mode button is selected and displayed, and the others are displayed normally (step S540).

(Third embodiment)
For purposes such as supplementary explanation or clarification of explanations in presentations where conference materials, lecture materials, etc. are connected to a tablet PC, or a large display device with a touch panel (PDP, liquid crystal rear projector, etc.) is connected, displayed, and implemented. Then, characters are drawn by hand on the conference material. This overwriting has meaning for the conference material at the time of overwriting, and it becomes an obstacle when the display change (scrolling, page turning) of the conference material is performed. For this reason, when there is no need to redisplay, it is necessary to delete, and when necessary, a save operation is required. Therefore, the present invention eliminates the need for a save operation.

  Also, when displaying the overwrite page list, it is unclear what is meant even if only the overwrite is displayed, so it is also necessary to display the document image that has been overwritten. For this reason, the document image at the time of overwriting is saved, but if scroll display and overwriting are repeated in the same page, a plurality of images in the same page are saved. Therefore, the present invention makes it unnecessary to save a document image displayed as a list of overwritten pages. In addition, the overwrite page list is displayed from the stored image, the page is selected from the overwrite + document image contents, the document page number is obtained from the overwrite list to display the document page, and the target page is selected by the page turning operation provided by the document APL. An operation to display is required. Therefore, the present invention eliminates the page turning operation.

  In addition, when the conference material is created in A4 vertical, A3, etc., the entire page cannot be displayed in the normal 100% display, so the target portion is displayed by scroll display. When there is no concept of page size such as Excel, the document may have a considerable length from the upper end to the lower end, or from the left end to the right end. In general, when a page is displayed, the upper left corner of the page is displayed at the upper left corner of the document display area on the screen. For this reason, a scroll operation is required to display the lower end of the page and the vicinity of the right end. Therefore, the present invention eliminates the scroll operation.

  In addition, in order to display the overwrite of the newly displayed document by turning the page of the document page and scrolling display, the overwrite page is displayed from the overwrite page list, the overwrite of the displayed document is searched, and the saved image is displayed. There is a need. In addition, since it is difficult to store all overwritten document pages, it is necessary to search for whether or not there is an overwriting of the displayed document by displaying the overwriting list every time the page is turned and scrolled. Therefore, the present invention automatically displays overwriting. In addition, if the document display area on the screen is small, scroll display frequently occurs and the efficiency of presentation is deteriorated. Therefore, the present invention increases the display information. Furthermore, if the document display area on the screen is small, scroll display frequently occurs and the efficiency of presentation is deteriorated. Therefore, the present invention improves the efficiency of presentation. Hereinafter, these will be described in detail with specific examples.

  First, the system configuration according to this embodiment will be described with reference to FIGS. 50-1 and 50-2. Lecture created as an electronic document by connecting a large display device (display integrated coordinate input device 110) such as a PD with a coordinate input device transparently installed on the display surface and a liquid crystal rear projector as a display of a PC (PC) 100P. (Lecture) In order to display materials and improve the efficiency of presentations, handwritten characters (figure) are drawn by overwriting with a coordinate indicator such as a pen, and document information is acquired by the I / F provided by the document creation program. Document position and drawing position Save the drawing data and redisplay it at the document position at the time of drawing. FIG. 50-2 shows an operation diagram of the tablet PC (100T, Tm) connected to the projector 30 and the tablet PC using a dedicated pen. In addition, the document creation program (sentence APL) that creates conference materials is the document information being displayed (total number of pages, display page number (Excel: sheet number, PowerPoint: slide number)), display magnification, document upper left origin coordinates , Document width, document height). Currently, this function is provided by Microsoft, Inc. using Word, Excel, and PowerPoint.

  The configuration of the display-integrated coordinate input device 110, the light blocking coordinate detection method, the configuration of the tablet PC, and the electromagnetic induction coordinate detection method are the same as those in FIGS. .

  Next, screen display information that can be acquired by an I / F provided by the OS will be described with reference to FIG. As shown in the figure, the screen width (W) and the screen height (H) are acquired. Acquires window information (upper left origin coordinates, width, height, window identification) while the screen is displayed. Searches for a window with a window identification value that indicates a scroll bar (window identification (ScrollBar in the US Microsoft)). , (Window width> window height), it is determined that the window is a horizontal scroll bar window, and upper left origin coordinates (HX, HY), window width (HW), and window height (HH) are acquired (FIG. 51 [2]). reference). The horizontal scroll box width (HB) and horizontal scroll box position (HP) are acquired (see FIG. 52 [3]). The horizontal scroll length (HL) is acquired (see FIG. 52 [4]). Acquires window information (upper left origin coordinates, width, height, window identification) while the screen is displayed. Searches for a window with a window identification value that indicates a scroll bar (window identification (ScrollBar in the US Microsoft)). , (Window width <window height), it is determined that the window is a vertical scroll bar window, and upper left origin coordinates (VX, VY), window width (VW), and window height (VH) are acquired (FIG. 51 [5]). reference). The vertical scroll box width (VB) and the vertical scroll box position (VP) are acquired (see FIG. 51 [6]). The vertical scroll length (VL) is acquired (see FIG. 51 [7]).

  Next, document information acquired by an I / F provided by a program for creating a document (referred to as document APL) will be described with reference to FIG. The document upper left origin coordinates (DX, DY) as the upper left origin (0, 0) of the screen of the document (page, sheet, slide) are acquired (see FIG. 52 [1]). If the upper left origin of the document is outside the screen, the value is negative. The document width (DW) and document height (DH) are acquired (see FIG. 52 [2]). Document display area upper left origin coordinates (PX, PY) are acquired (see FIG. 52 [3]). The screen display area width (PW) and height (PH) are acquired. (See FIG. 52 [4]) Display page number (sheet number, slide number) (P), display magnification (V), and total number of pages (N) are acquired (see FIG. 52 [5]).

Next, a document coordinate calculation method will be described with reference to FIG. The upper left origin coordinates (DX, DY), document width (DW), sentence height (DH), and display magnification% (V) of the document are acquired by the I / F provided by the document APL, screen width (W), screen height (H) is acquired by the I / F provided by the OS. When the upper left origin is in the screen, the document coordinates (XP, YP) of the screen coordinates (X, Y) are as follows.
Document coordinates are converted when 100% is displayed (see FIG. 53 [1]).
XP = (X−DX) × (100 / V)
YP = (Y−DY) × (100 / V)
When the upper left origin is outside the screen, (−DX) and (−DY) are obtained, and the document coordinates (XP, YP) of the screen coordinates (X, Y) are as follows (see FIG. 53 [2]).
XP = (X − (− DX)) × (100 / V)
YP = (Y − (− DY)) × (100 / V)
When (DY + DH) <H, it is determined that the document is displayed across two pages, and the page interval (DS) is acquired by the I / F provided by the document APL (see FIG. 53 [3]). The inter-page area is the previous page area. The document coordinates (XP, YP) of the screen coordinates (X, Y) on the (P + 1) page are as follows (see FIG. 53 [4]).
XP = (X−DX) × (100 / V)
YP = (Y− (DY + DH + DS)) × (100 / V)

Next, a calculation method from document coordinates to screen coordinates will be described with reference to FIG. The upper left origin coordinates (DX, DY) of the document, document width (DW), document height (DH), display magnification% (V), display page number (P) provided by the document APL, I / F, screen width ( W) and the screen height (H) are acquired by the I / F provided by the OS. It is assumed that the document coordinates are converted and saved to the coordinates at the time of 100% display.
The screen coordinates (X, Y) of the document coordinates (XP, YP) of page P are as follows (see FIG. 54 [1]).
X = XP × (V / 100) + DX
Y = YP × (V / 100) + DY
The screen area of page P has upper left corner coordinates (0, 0) and lower right corner coordinates (W-1, DY + DH + DS-1), and coordinates outside this area are outside the screen (see FIG. 54 [2]).
The screen coordinates (X1, Y1) of the document coordinates (XP1, YP1) of the (P + 1) page are as follows (see FIG. 54 [3]).
X1 = XP1 × (V / 100) + DX
Y1 = YP1 × (V / 100) + (DY + DH + DS))
The screen area of the (P + 1) page has upper left coordinates (0, DY + DH + DS) and lower right coordinates (W-1, H-1), and coordinates outside this area are outside the screen (see FIG. 54 [4]).

Next, the relationship between the document display position and the scroll box position will be described with reference to FIGS. 55-1 and 55-2. When the upper left corner of page P is displayed at the upper left corner of the screen display area, the total number of pages (N), display page number (P), and the document height from page 1 to page N are provided by the I / F provided by document APL. (DH1, DH2,... DHN) are acquired, the scroll bar information is acquired by the I / F provided by the OS, and the vertical scroll length (VL) is calculated (see FIG. 55-1 [1]). At this time:
VL: VP = (DH1 + DH2 + ... + DHN): (DH1 + DH2 + ... + DH (P-1))
VP = VL * (DH1 + DH2 + ... + DH (P-1)) / (DH1 + DH2 + ... + DHN)
Move to the horizontal scroll box position (0) and the vertical scroll box position (calculated value in [1] above) (see FIG. 55-1 [2]). The document display area upper left origin coordinates (PX, PY), width (PW), and height (PH) are acquired by the I / F provided by the document APL, and the horizontal scroll box width is obtained by the I / F provided by the OS. (HB), the vertical scroll box width (VB) is acquired.
When the document coordinates (XP, YP) are displayed on the screen coordinates (X, Y), the screen display area left side length (HS = XP−X + PX) is calculated (see FIG. 55-1 [3]). At this time:
HP: HB = (XP−X + PX): PW
HP = HB × (XP−X + PX) / PW
[4] When the document coordinates (XP, YP) are displayed on the screen coordinates (X, Y), the vertical scroll box movement amount (α) and the screen display area upper side length (VS = YP−Y + PY) are set (FIG. 55−). 2 [4]). At this time:
α: VB = (YP−Y + PY): PH
α = VB × (YP−Y + PY) / PH
From the above, when the document coordinates (XP, YP) are displayed on the screen coordinates (X, Y), the horizontal scroll box position (HP) and the vertical scroll box position (VP + α) are obtained.

Next, a display area in the case where the document coordinates (XP, YP) are displayed near the center of the screen display area will be described with reference to FIGS. 56-1 and 56-2. The document display area upper left origin coordinate (PX, PY), document display area width (PW), and document display area height (PH) are obtained by the interface provided by the document APL. The coordinates (X, Y) are calculated (see FIG. 56-1 [1]).
X = (PX + PW) / 2, Y = (PY + PH) / 2
When the document coordinates (XP, YP) are displayed near the center of the screen display area, the right end length (XW) of the XP page and the lower end length (YH) of the YP page are calculated (see FIG. 56-1 [2]).
XW = DW-XP, YH = DH-YP
When PW / 2 ≦ XP, PW / 2 ≦ XW, PH / 2 ≦ YP, and PH / 2 ≦ YH, the (XP, YP) point is displayed at the screen document display area midpoint coordinate (X, Y) ( Refer to FIG. 56-1 [3].
If PW2> XP, XP = PW / 2, and PH / 2> YP, then set YPPH / 2 and display the (XP, YP) point at the screen document display area midpoint coordinate (X, Y) ( Refer to FIG. 56-1 [4].
When PW / 2> XW, XP = DW−PW / 2, and when PH / 2> YH, YP = DH−PH / 2, and the (XP, YP) point is the screen document display area midpoint coordinate ( X, Y) (see FIG. 56-2 [5]).

  Next, the document full-screen display will be described with reference to FIG. The overwriting control program displays the document image in the upper left origin coordinate (WX, 0), width (WW), and height (WH) of the display area (see FIG. 57 [1]). The upper left origin coordinates (DX, DY) of the document image are changed by scroll display (see FIG. 57 [2]). A vertical scroll bar is displayed, and a document image is vertically scrolled (see FIG. 57 [3]). A horizontal scroll bar is displayed, and the document image is horizontally scrolled (see FIG. 57 [4]).

  The overwriting stroke information, overwriting drawing, and erasing are basically the same as those in FIG. 9 described above, and thus description thereof is omitted here.

  Next, the overwrite operation will be described with reference to FIGS. 58-1 and 58-2. The “overwrite control program” is activated by means provided by the OS, such as double-clicking on the desktop icon, and the “overwrite toolbar” is displayed (see FIG. 58-1 [1]). The “Setting” button displays the “Overwrite Setting Dialog Box”, and sets the pen thickness and color at the time of overwriting, and the size of the eraser cursor at the time of erasure (see FIG. 58-1 [2]). The pen thickness is selected from the “thickness” list, and the pen color is selected from the “color” list (see FIG. 58-1 [3]). The size of the eraser cursor is adjusted by dragging the operation handle (see FIG. 58-1 [4]). When the “pen” or “erase” button is pressed, the mode shifts to the overwrite mode (see FIG. 58-1 [5]). At this time, an overwriting window (transparent window of full screen size) for drawing overwriting is displayed, and drawing and erasing are executed on this window. At the time of overwriting, document information (upper left origin coordinates, width, height, display magnification%, page number) is acquired by an I / F provided by the document APL, and the overwriting is stored in an overwriting file in association with the document position. (Refer to FIG. 58-1 [6].) The “APL” button deletes the overwrite window to enable an operation provided by a normal OS (see FIG. 58-1 [7]). A list of page images of the overwritten and overwritten document is displayed by a “list” button (see FIG. 58-1 [8]). The image of the page that has been overwritten is acquired by the I / F provided by the document APL for each page (Excel is a sheet, PowerPoint is a slide), drawn over the same image, and reduced and displayed in units of pages (FIG. 58-). 1 [9]). A page image and a display position are selected by clicking (see FIG. 58-1 [10]). A display page and a display position are acquired by double-clicking on the page (see FIG. 58-1 [11]).

  Further, the horizontal scroll box position and the vertical scroll box position are calculated and moved to the calculated value so that the click point is displayed near the center of the document display area. After the movement, the overwriting to the display document is searched from the overwriting file and drawn at the document position at the time of overwriting (see FIG. 58-2 [12]). A full screen display of the document image is shown (see FIG. 58-2 [13]). At this time, when there is a scroll display in the vertical direction, a vertical scroll bar is displayed, and when there is a scroll display in the horizontal direction, a horizontal scroll bar is displayed. A full-screen toolbar is displayed, an overwrite is added by a “pen” button, and an overwrite is erased by an “erase” button (see FIG. 58-2 [14]). Return to the list by the “Return” button (see FIG. 58-2 [15]).

  Next, the overwrite control operation will be described with reference to the flowchart of FIG. Here, the overwriting control program is activated by means provided by the OS, such as a desktop icon double click, and controls overwriting. First, an overwrite file is created and initialized (total number of overwrite pages = 0) (step S601). Further, the default pen color, thickness, eraser cursor length, and created overwrite file name are set in the overwrite control data that is commonly referred to for each control (step S602), and the overwrite toolbar is displayed (step S603). ). The APL overwrite mode is set (step S604), the overwrite mode is set to "APL (application)", and the APL button of the overwrite toolbar is selected and displayed (normal display and two types of display modes are provided) (step S605). Pen (mouse) operation mouse data is input (step S606). Overwrite toolbar operation data is input in the APL mode, and all operation data is input in the drawing and deletion modes. Subsequently, it is determined whether the coordinates are the overwrite toolbar coordinates (step S607). If the coordinates are not the overwrite toolbar coordinates, it is further determined whether the drawing overwrite mode is set (step S608). “Overwrite drawing control” is executed by an operation outside the overwrite toolbar in the drawing mode (step S609). If it is not the drawing overwrite mode in step S608, it is further determined whether or not it is the erasing overwrite mode (step S610). If it is the erasing overwrite mode, “overwrite erasure control” is performed by an operation outside the overwrite toolbar in the erasure mode. It executes (step S611). If the coordinates are the overwrite toolbar coordinates in step S607, "overwrite toolbar control" is executed by operating the overwrite toolbar (step S612). The overwrite control is ended by the “end” button of the overwrite toolbar (step S613). Further, it is determined whether the mode is the APL overwriting mode (step S614). If the mode is not the APL overwriting mode, the overwriting window is deleted (step S615). Further, the overwriting toolbar is deleted (step S616), the overwriting file saving process is executed, and the process ends (step S617).

  Next, the overwrite toolbar control operation will be described with reference to the flowcharts of FIGS. 60-1 and 60-2. Here, the mouse data when the mouse button is ON (pen down) is executed as an argument. First, the overwrite mode button selected and displayed is normally displayed, and the clicked button is selected and displayed (step S621). The click button information is saved (step S622), and mouse data up to the mouse button OFF (pen-up) is input (step S623). Subsequently, it is determined whether the mouse button is OFF (step S624). If the mouse button is OFF, it is determined whether the coordinates are on the click button (step S625). If the coordinates are on the click button, it is determined whether the button is a pen click button (step S626). If the button is a pen click button, it is determined whether the APL overwrite mode is selected (step S627). If the coordinates when the mouse button is OFF are not on the button when the mouse button is ON in step S625, no processing is performed. If the APL overwrite mode is selected in step S627, the upper left origin coordinate (DX, DY), width (DW), high by the I / F provided by the document APL when the “pen” button is used to shift from the APL mode to the drawing mode (DH), display page number (P), and display magnification (V) are acquired and set in the overwrite control data (step S628). Subsequently, “overwrite display control” is executed, overwriting to the currently displayed document page is input and drawn from the overwrite file (step S629), and the drawing overwrite mode is set (step S630). If it is not a pen click button in step S626, it is further determined whether it is an erase click button (step S631), and if it is an erase click button, it is further determined whether it is an APL overwrite mode (step S632). . In the APL overwrite mode, when the APL mode is shifted from the APL mode to the erasing mode by the “erase” button, the document upper left coordinate (DX, DY), width (DW), height (I / F provided by the document APL) DH), display page number (P), and display magnification (V) are acquired and set in the overwrite control data (step S633). Further, “overwrite display control” is executed, overwriting to the currently displayed document page is input and drawn from the overwrite file (step S634), and the erasure overwrite mode is set (step S635). If it is not a delete click button in step S631, it is further determined whether the button is an APL click button (step S636). If it is an APL click button, the overwrite window is deleted when the drawing / erasure mode is shifted to the APL mode. Then, the function operation provided by the normal OS is enabled (step S637). Thereafter, the APL overwrite mode is set (step S638). If it is an APL click button in step S635, it is further determined whether it is a list click button (step S639). If it is a list click button, "overwrite list display control" is executed by the "list" button. (Step S640). If it is not a click button in the list in step S639, it is further determined whether it is a click button for setting (step S641). If it is a click button for setting, an “overwrite setting dialog box” is displayed by the “set” button. The pen thickness, color, and eraser cursor length are input and set in the overwrite control data (step S642), the click button is normally displayed, and the overwrite mode button is selected and displayed (step S643).

  Next, the overwrite drawing control operation will be described with reference to the flowchart of FIG. Here, the mouse coordinates at the start of drawing are executed as input values. First, the mouse coordinates at the start of drawing are saved in the drag coordinate data (step S651). Mouse data up to the mouse button OFF (pen-up) is input (step S652). Subsequently, it is determined whether the mouse button is OFF (step S653). If the mouse button is not OFF, the input mouse coordinates are saved in the drag coordinate data (step S654), and the pen color set in the overwrite control data is changed. A line is drawn between the current input coordinate and the previous input coordinate based on the pen thickness (step S655). If the mouse button is OFF in step S653, the upper left origin coordinates (DX, DY), width (DW), height (DH), display page number (P), and display magnification (V) are acquired from the overwrite control data. (Step S656) The screen width (W) and height (H) are acquired (Step S657). Subsequently, it is determined whether or not the display is two pages (step S658). That is, when (DY + DH) <H, it is determined that the document is displayed across two pages. When displayed across two pages, the page interval (DS) is acquired from the document APL (step S659). Subsequently, it is determined whether it is the start coordinate P page area (step S660). Here, if the drag start Y coordinate <(DY + DH + DS), the P page is overwritten. If it is the start coordinate P page area, the drag coordinates are converted into document coordinates (step S661), and the stroke data is added to the document page number (P) storage area of the overwrite file (step S662). If it is not the start coordinate P page area in step S660, the document coordinates are converted into drag coordinates (step S663), and the stroke data is added to the document page number (P + 1) storage area of the overwrite file (step S664).

  Next, the overwrite erasure control operation will be described with reference to the flowchart of FIG. Here, the mouse coordinates at the start of erasure are executed as input values. First, the upper left origin coordinates (DX, DY), width (DW), height (DH), display page number (P), and display magnification (V) are obtained from the overwrite control data (step S671). Subsequently, the screen width (W) and height (H) are acquired (step S672), and the document page number (P) stroke data is input from the overwrite file (step S673). Subsequently, it is determined whether or not the display is two pages (step S674). That is, when (DY + DH) <H, it is determined that the document is displayed across two pages. If two pages are displayed, the stroke data of the document page number (P + 1) is input from the overwrite file (step S675). Further, the stroke coordinates (document coordinates) are converted into screen coordinates (step S676). The mouse coordinates at the start of erasure are saved in the drag coordinate data (step S677). Subsequently, mouse data up to mouse button OFF (pen-up) is input (step S678), and it is determined whether the mouse button is OFF (step S679). If the mouse button is not OFF, the input mouse coordinates are stored in the drag coordinate data (step S680), an eraser cursor area is calculated with the input mouse coordinates as the center of the rectangle (step S681), and the screen in the eraser cursor area is displayed. The coordinates are searched (step S682). Subsequently, it is determined whether or not the cursor area is present (step S683). If the cursor area is present, the eraser area of the overwrite window is set to a transparent color and the overwrite character is erased (step S684), and the screen coordinates for the eraser cursor area are displayed. Is deleted (step S685). If the middle of the stroke is deleted, the stroke is divided. Subsequently, the screen coordinates are converted into stroke coordinates (document coordinates) (step S686) and replaced with the document page number (P) stroke data of the overwrite file (step S687). Subsequently, it is determined whether or not the display is two pages (step S688). If the two pages are displayed, the stroke coordinates are set on the (P + 1) page screen (step S689), and the document page number (P + 1) stroke of the overwrite file is set. Replace with data (step S690).

  Next, the overwrite display control operation will be described with reference to the flowchart of FIG. First, an overwrite window (full-screen size transparent window) is created and displayed on the forefront (step S691). Subsequently, the document upper left origin coordinates (DX, DY), width (DW), height (DH), display page number (P), and display magnification (V) are acquired from the overwrite control data (step S692), and the screen width. (W) and height (H) are acquired (step S693). Further, the document page number (P) stroke data is input from the overwrite file (step S694), and it is determined whether or not the two-page display is performed (step S695). Here, if (DY + DH) <H, it is determined that the document is displayed across two pages. If two pages are displayed, the document page number (P + 1) stroke data is input from the overwrite file (step S696). Further, the stroke coordinates (document coordinates) are converted into screen coordinates (step S697), and drawing is performed in units of strokes (step S698). The immediately preceding coordinate is set to 0xFFFF (step S699), and it is determined whether the screen coordinates are within (SW, SH-1) from (0, 0) (step S700). If it is not in-screen coordinates, the immediately preceding coordinate is set to 0xFFFF (step S701). If it is in-screen coordinates in step S700, it is further determined whether the immediately preceding coordinate is 0xFFFF (step S702), and a line between the coordinates is drawn with the color and thickness set in the stroke (step S703). Subsequently, the immediately previous coordinate is set as the screen coordinate (step S704), and further, it is determined whether the one-stroke screen coordinate is completed (step S705), and the in-screen coordinates of all the strokes on the display page are searched (step S706).

  Next, the overwrite list display control operation will be described with reference to the flowchart of FIG. First, an overwrite list dialog box is displayed (step S711), the document page number that has been overwritten is input from the overwrite file, and the document image data of the same page is acquired by the I / F provided by the document APL (step S712). . Subsequently, overwriting data on the document image is input and drawn from the overwriting file (step S713), and the page image (document image + overwriting) is reduced and displayed in the overwriting list dialog box (step S714). Subsequently, it is determined whether or not the overwriting all-page display is made (step S715), and if it is the writing all-page display, it is further determined whether or not it is mouse data input (step S716). The function at the mouse coordinates when OFF (pen-up) is executed (step S717). Subsequently, it is determined whether the coordinates are on the page image (step S718). If the coordinates are on the page image, the selected document page number and display position coordinates are calculated and stored (step S719). If the coordinates are not on the page image in step S718, it is further determined whether the coordinates are full screen button coordinates (step S720). If the coordinates are full screen button coordinates, the overwrite list dialog box is deleted (step S721). "Overwrite page full screen display control" is executed by the "" button, and the selected document page image is displayed on the full screen (step S722). If it is not a full-screen button coordinate in step S720, it is further determined whether it is a display button coordinate (step S723). If it is a display button coordinate, the overwrite list dialog box is deleted (step S724), and in the APL overwrite mode. It is determined whether or not there is (step S725). Here, in the APL overwrite mode, display control of the overwrite page is executed. (Step S726). If it is not in the APL overwrite mode in step S725, the “display” button is used to erase the overwrite window in the drawing or erasing mode (step S727). Subsequently, “overwrite display page control” is executed, the display position coordinates of the selected document page are displayed near the center of the document display area on the screen (step S728), “overwrite display control” is executed, and the display document is overwritten. Is displayed at the document position at the time of overwriting (step S729). If it is not the display button coordinates in step S723, it is further determined whether the coordinates are the return button coordinates (step S730). If the coordinates are the return button coordinates, the “return” button is used to clear the overwrite list dialog box and the overwrite list display control is terminated. (Step S731).

  Next, the overwrite page display control flow will be described with reference to the flowcharts of FIGS. 65-1 and 65-2. Here, the description will be made based on the aforementioned scroll box position calculation (see FIGS. 55-1 and 2) and document display area calculation (see FIGS. 56-1 and 2). First, the scroll bar information of the document APL is acquired by the I / F provided by the OS (step S741), and the vertical scroll length (VL) is calculated from the acquired scroll bar information (step S742). Subsequently, the total number of pages (N), the display page number (P), and the document heights (DH1, DH2,... DHN) of all pages are acquired by the I / F provided by the document APL (step S743). . Subsequently, the total document height of all pages (DH0, DH1,... DHN) and the total document height up to the pre-display page (P-1) (DH1, DH2,... DH (P-1) ) And the vertical scroll box position (VP) is calculated (step S744). Further, the vertical scroll box is moved to VP by the I / F provided by the OS (step S745), and the horizontal scroll box is moved to the left end (position = 0) by the I / F provided by the OS (step S746). Subsequently, the origin coordinates (PX, PY) of the document display area in the screen are obtained by the I / F provided by the document APL (step S747), and the document display area in the screen is obtained by the I / F provided by the document APL. The document width (PW) is acquired (step S748). Subsequently, the document height (PH) of the document display area in the screen is acquired by the I / F provided by the document APL (step S749), and the document width (DW) of the display page is obtained by the I / F provided by the document APL. Is acquired (step S750). Subsequently, a length (XW = DW−XP) from the display document coordinate XP to the right end of the document is calculated (step S751). Subsequently, the length (YH = DH−YP) from the display document coordinates YP to the lower end of the document is calculated (step S752), whether XP <PW / 2 is determined (step S753), and XP <PW / 2. If so, the document coordinate X is set to (PW / 2) (step S754). If XP <PW / 2 is not satisfied in step S753, it is further determined whether XW <PW / 2 (step S755). If XW <PW / 2, the document coordinate X is (DW−PW / 2). (Step S756). If XW <PW / 2 is not satisfied in step S755, that is, if (PW / 2 ≦ XP, PW / 2 ≦ XW), the document coordinate X is set to (XP) (step S757). Subsequently, it is determined whether YP <PH / 2 (step S758). If YP <PH / 2, the document coordinate Y is set to (PH / 2) (step S759). If YP <PH / 2 is not satisfied in step S758, it is further determined whether YH <PH / 2 is satisfied (step S760). If YH <PH / 2, the document coordinate Y is set to (DH-PH / 2) (step S761). If YH <PH / 2 is not satisfied in step S760, that is, if (PH / 2 ≦ YP, PH / 2 ≦ YH), the document coordinate Y is set to (YP) (step S762). Subsequently, the central coordinates (Xs = PX + PW / 2, Ys = PY + PH / 2) of the in-screen document display area are calculated (step S763). Further, the horizontal scroll box position (HP) when the document coordinates (X, Y) becomes the screen document display area center coordinates (Xs, Ys) is calculated (step S764). Subsequently, the horizontal scroll box is moved to the HP by the I / F provided by the OS (step S765). Further, the amount of movement (α) of the vertical scroll box when the document coordinates (X, Y) become the screen document display area center coordinates (Xs, Ys) is calculated (step S766), and the vertical scroll is performed by the I / F provided by the OS. The box is moved to (VP + α) (step S767).

  Next, the overwrite page full-screen display control operation will be described with reference to the flowchart of FIG. Here, the page number to be displayed on the full screen is executed as an input value. First, a full screen window (page image display area, horizontal scroll bar, vertical scroll bar) is displayed on the forefront (step S771). Further, the image of the display page is acquired by the I / F provided by the document APL (step S772), and the display page image is displayed on the full screen window (step S773). Subsequently, the upper left origin coordinate, document width, document height, display page number, and display magnification of the display page image are set in the overwrite control data (step S774), and the full screen toolbar is displayed (step S775). Subsequently, the drawing is set to the full screen mode (step S776), the full screen mode is set to “draw”, the full screen toolbar “pen” button is selected and displayed (step S777), and the “overwrite display control” is executed. The overwriting to the display page is input from the overwriting file and is drawn at the overwriting position (step S778). Subsequently, mouse data when the mouse button is ON (pen down) is input (step S779). It is determined whether the horizontal scroll bar coordinates (step S780). If the horizontal scroll bar coordinates, that is, if the button on the horizontal scroll bar is ON, "horizontal scroll display control" is executed, and the page image is scrolled. (Step S781). If it is not the horizontal scroll bar coordinate in step S780, it is further determined whether it is the vertical scroll bar coordinate (step S782). If it is the vertical scroll bar coordinate, that is, if the button on the vertical scroll bar is ON, “vertical” is determined. "Scroll display control" is executed, and the page image is scroll-displayed (step S783). If it is not the vertical scroll bar coordinate in step S782, it is further determined whether it is the full screen toolbar coordinate (step S784). If it is not the full screen toolbar coordinate, it is further determined whether the full screen mode is drawing (step S785). ) When the full screen mode is drawing, “overwrite drawing control” is executed in the drawing mode, and additional drawing is performed (step S786). If the full-screen mode is not drawing in step S785, “overwrite erase control” is executed in the erase mode to erase the overwrite (step S787). If the coordinates are not full screen toolbar coordinates in step S784, if the button is ON on the full screen toolbar, "full screen toolbar control" is executed (step S788). Subsequently, it is determined whether or not the return button is touched (step S789). If the back button is touched, the full screen toolbar is deleted (step S790), and the full screen toolbar “return” button is used to display the full screen window and the full screen. The tool bar is deleted (step S791). Further, the document display information is acquired by the I / F provided by the document APL and set in the overwrite control data (step S792).

  Next, the full screen toolbar control operation will be described with reference to the flowchart of FIG. Here, the mouse button ON coordinate is executed as an input value. First, the full screen mode button is normally displayed, the mouse button ON coordinate button is selected and displayed, and the button information is saved (steps S801 and S802). Mouse data up to the mouse button OFF is input (step S803). It is determined whether the mouse button is OFF (step S804). If the mouse button is OFF, it is further determined whether the coordinates are on the click button (step S805). If the coordinates are on the click button, it is determined whether the button is a pen click button (step S806). If the button is a pen click button, the full screen mode is set to “draw” using the “pen” button ( Step S807). If the coordinates when the mouse button is OFF are not on the click button in step S805, no processing is performed. If it is not a pen click button in step S806, it is further determined whether it is a delete click button (step S808). If it is an erase click button, the “delete” button sets the full screen mode to “delete”. (Step S809). If it is determined in step S808 that the button is not an erasure click button, it is further determined whether the button is a setting click button (step S810). Here, if it is a click button for setting, the “set” button displays the overwrite setting dialog box, inputs the pen color, thickness, eraser cursor length, sets the overwrite control data (step S811), and clicks the click button. The normal display and full screen mode buttons are selected and displayed (step S812).

  Next, the horizontal scroll display control operation will be described with reference to the flowchart of FIG. First, the overwrite window is erased (step S821), and the page image can be scrolled. Subsequently, the presence / absence of mouse data input is determined (step S822). If it is mouse data input, it is further determined whether the mouse button is OFF (step S823). Is determined (step S824). Here, if it is on the horizontal scroll bar, the horizontal scroll box is moved to the input mouse coordinates (step S825). Subsequently, the page image is horizontally scrolled by the amount of movement of the horizontal scroll box (step S826). Further, the upper left origin coordinate of the page image (document) moved by scroll display when the mouse button is turned off is set in the overwrite control data (step S827), "overwrite display control" is executed, and the overwrite to the display page is input from the overwrite file. Then, drawing is performed at the position at the time of overwriting (step S828).

  Next, the vertical scroll display control operation will be described with reference to the flowchart of FIG. First, the overwrite window is erased (step S831), and the page image can be scrolled. Subsequently, the presence / absence of mouse data input is determined (step S832). If mouse data is input, it is further determined whether the mouse button is OFF (step S833). Is determined (step S834). Here, if it is on the vertical scroll bar, the vertical scroll box is moved to the input mouse coordinates (step S835). Subsequently, the page image is vertically scrolled by the amount of vertical scroll box movement (step S836). Further, the upper left origin coordinate of the page image (document) moved by scroll display when the mouse button is turned off is set in the overwrite control data (step S837), "overwrite display control" is executed, and the overwrite to the display page is input from the overwrite file. Then, drawing is performed at the position at the time of overwriting (step S838).

  As described above, the electronic conferencing system according to the present invention displays on a screen an electronic conference in which computer devices such as a PDA, a tablet PC, and a display with a touch panel are communicatively connected, or a conference information created on the PC, and the conference, lecture, It is suitable for a system that performs presentations, classes, etc., and is particularly suitable for a usability system in which overwrite information is written in conference information, these positions are associated with each other, stored, displayed, and edited.

It is explanatory drawing which shows the 1st structure of the PC conference system concerning the 1st Embodiment of this invention. It is explanatory drawing which shows the 2nd structure of the PC conference system concerning the 1st Embodiment of this invention. It is explanatory drawing which shows the 3rd structure of the PC conference system concerning the 1st Embodiment of this invention. It is explanatory drawing which shows the structure of the display integrated coordinate input device in the system of FIG. It is explanatory drawing which shows the structure of the coordinate input device of FIG. It is explanatory drawing which shows the structure of tablet PC in the system of FIG. It is a figure which shows the structure of the electromagnetic induction coordinate detection system in FIG. It is a graph which shows distribution of the induced electromotive force of the electromagnetic induction coordinate detection system in FIG. It is explanatory drawing which shows the scroll information concerning the 1st Embodiment of this invention. It is explanatory drawing which shows the scroll space concerning the 1st Embodiment of this invention. It is explanatory drawing which shows the screen coordinate calculation method concerning the 1st Embodiment of this invention. It is explanatory drawing which shows the detection method of the display condition change concerning the 1st Embodiment of this invention. It is explanatory drawing which shows the overwrite scroll data concerning the 1st Embodiment of this invention. It is explanatory drawing which shows overwrite area selection operation concerning the 1st Embodiment of this invention. It is explanatory drawing which shows overwrite operation (1) concerning the 1st Embodiment of this invention. It is explanatory drawing which shows overwrite operation (2) concerning the 1st Embodiment of this invention. It is explanatory drawing which shows the correction method of overwriting browsing concerning the 1st Embodiment of this invention. It is a flowchart which shows the overwrite control operation | movement concerning the 1st Embodiment of this invention. It is a flowchart which shows the overwrite start control operation concerning the 1st Embodiment of this invention. It is a flowchart which shows the overwrite toolbar control operation | movement (1) concerning the 1st Embodiment of this invention. It is a flowchart which shows the overwrite toolbar control operation | movement (2) concerning the 1st Embodiment of this invention. It is a flowchart which shows the overwrite drawing control operation | movement concerning the 1st Embodiment of this invention. It is a flowchart which shows the overwrite deletion control operation | movement concerning the 1st Embodiment of this invention. It is a flowchart which shows the overwrite display control operation concerning the 1st Embodiment of this invention. It is a flowchart which shows the control operation of the document display state monitoring concerning the 1st Embodiment of this invention. It is explanatory drawing which shows the scroll space concerning the 2nd Embodiment of this invention. It is explanatory drawing which shows the screen coordinate calculation method concerning the 2nd Embodiment of this invention. It is a block diagram which shows the structure of PC conference control concerning the 2nd Embodiment of this invention. It is explanatory drawing which shows the structure data of PC meeting control concerning the 2nd Embodiment of this invention. It is explanatory drawing which shows the example of operation of meeting sponsorship start concerning the 2nd Embodiment of this invention. It is explanatory drawing which shows the example of operation of the conference participation start concerning the 2nd Embodiment of this invention. It is explanatory drawing which shows the example of PC screen unification concerning the 2nd Embodiment of this invention. It is explanatory drawing which shows the example of overwrite operation concerning the 2nd Embodiment of this invention. It is explanatory drawing which shows the example of operation of overwrite redrawing concerning the 2nd Embodiment of this invention. It is explanatory drawing which shows the operation right transfer (1) concerning the 2nd Embodiment of this invention. It is explanatory drawing which shows the operation right transfer (2) concerning the 2nd Embodiment of this invention. It is explanatory drawing which shows the overwrite edit operation example (1) concerning the 2nd Embodiment of this invention. It is explanatory drawing which shows the overwrite edit operation example (2) concerning the 2nd Embodiment of this invention. It is explanatory drawing which shows the example of overwrite setting operation concerning the 2nd Embodiment of this invention. It is a flowchart which shows the initialization control operation | movement concerning the 2nd Embodiment of this invention. It is a flowchart which shows the meeting sponsor control operation | movement concerning the 2nd Embodiment of this invention. It is a flowchart which shows the conference participation control operation | movement concerning the 2nd Embodiment of this invention. It is a flowchart which shows the conference monitoring control operation | movement concerning the 2nd Embodiment of this invention. It is a flowchart which shows the network control operation | movement concerning the 2nd Embodiment of this invention. It is a flowchart which shows the control operation of PC screen unified packet reception concerning the 2nd Embodiment of this invention. It is a flowchart which shows the control operation of overwrite packet reception concerning the 2nd Embodiment of this invention. It is a flowchart which shows the control operation | movement of overwrite deletion packet reception concerning the 2nd Embodiment of this invention. It is a flowchart which shows the control operation of the operation right packet reception concerning the 2nd Embodiment of this invention. It is a flowchart which shows the overwrite control operation | movement (1) concerning the 2nd Embodiment of this invention. It is a flowchart which shows the overwrite control operation (2) concerning the 2nd Embodiment of this invention. It is a flowchart which shows the control operation of the overwrite toolbar concerning the 2nd Embodiment of this invention. It is a flowchart which shows the control action of the operation right toolbar concerning the 2nd Embodiment of this invention. It is a flowchart which shows the control operation | movement of the overwrite display concerning the 2nd Embodiment of this invention. It is a flowchart which shows the control operation | movement of the overwrite drawing concerning the 2nd Embodiment of this invention. It is a flowchart which shows the control operation | movement of overwriting deletion concerning the 2nd Embodiment of this invention. It is a flowchart which shows the control operation of the overwrite edit concerning the 2nd Embodiment of this invention. It is a flowchart which shows the control operation of the overwrite edit toolbar concerning the 2nd Embodiment of this invention. It is explanatory drawing which shows the 1st structure of the conference system concerning the 3rd Embodiment of this invention. It is explanatory drawing which shows the 2nd structure of the conference system concerning the 3rd Embodiment of this invention. It is explanatory drawing which shows the screen display information concerning the 3rd Embodiment of this invention. It is explanatory drawing which shows the document display information concerning the 3rd Embodiment of this invention. It is explanatory drawing which shows the calculation method of the document coordinate concerning the 3rd Embodiment of this invention. It is explanatory drawing which shows the calculation method of the screen coordinate concerning the 3rd Embodiment of this invention. It is explanatory drawing which shows the calculation method (1) of the scroll box position concerning the 3rd Embodiment of this invention. It is explanatory drawing which shows the calculation method (2) of the scroll box position concerning the 3rd Embodiment of this invention. It is explanatory drawing which shows the calculation method (1) of the document area | region concerning the 3rd Embodiment of this invention. It is explanatory drawing which shows the calculation method (2) of the document area | region concerning the 3rd Embodiment of this invention. It is explanatory drawing which shows the calculation method of the full-screen display document coordinate concerning the 3rd Embodiment of this invention. It is explanatory drawing which shows the example of overwriting operation (1) concerning the 3rd Embodiment of this invention. It is explanatory drawing which shows the overwrite operation example (2) concerning the 3rd Embodiment of this invention. It is a flowchart which shows the overwrite control operation | movement concerning the 3rd Embodiment of this invention. It is a flowchart which shows the control operation (1) of the overwrite toolbar concerning the 3rd Embodiment of this invention. It is a flowchart which shows the control operation (2) of the overwrite toolbar concerning the 3rd Embodiment of this invention. It is a flowchart which shows the control operation | movement of the overwrite drawing concerning the 3rd Embodiment of this invention. It is a flowchart which shows the control operation | movement of overwrite deletion concerning the 3rd Embodiment of this invention. It is a flowchart which shows the control operation | movement of the overwrite display concerning the 3rd Embodiment of this invention. It is a flowchart which shows the control operation | movement of the overwrite list display concerning the 3rd Embodiment of this invention. It is a flowchart which shows the control operation (1) of the overwrite page display concerning the 3rd Embodiment of this invention. It is a flowchart which shows the control operation (2) of the overwrite page display concerning the 3rd Embodiment of this invention. It is a flowchart which shows control operation of the overwrite page full screen display concerning the 3rd Embodiment of this invention. It is a flowchart which shows the control operation of the full-screen toolbar concerning the 3rd Embodiment of this invention. It is a flowchart which shows the control operation | movement of the horizontal scroll display concerning the 3rd Embodiment of this invention. It is a flowchart which shows the control operation | movement of the vertical scroll display concerning the 3rd Embodiment of this invention.

Explanation of symbols

10 LAN
100T, Tm Tablet PC
DESCRIPTION OF SYMBOLS 100P Personal computer 110 Display-integrated coordinate input device 200 PC screen 201 Document creation program 202 PC conference control program 204 Initialization control unit 205 Display monitoring control unit 206 Overwrite control unit 209 Conference file 153, 210 Overwrite file 215 Overwrite packet 225 Operation right packet

Claims (27)

In an electronic conference system that generates conference information and displays conference information created on the PC terminal on the conference information display means,
An electronic conference system comprising position alignment means for performing position alignment by associating a positional relationship between conference information displayed and output on the conference information display means and overwritten information overwritten on the conference information.   2. The electronic conference system according to claim 1, wherein the position matching unit stores the conference information and overwrite information and redraws the position at the time of overwriting.   2. The electronic conference system according to claim 1, wherein the position matching unit calculates a Y coordinate of a scroll space of an area for displaying the conference information and the overwrite information.   2. The electronic conference system according to claim 1, wherein the position matching unit calculates an X coordinate of a scroll space of an area for displaying the conference information and overwrite information.   The electronic conference system according to claim 1, wherein the position matching unit detects a change in display magnification due to a history of overwriting information with respect to the conference information.   6. The electronic conference system according to claim 5, wherein when the change in the display magnification is detected, the position alignment unit calculates a current display magnification from a height ratio of a vertical scroll box.   2. The electronic conference system according to claim 1, wherein the position matching unit detects a change in window size due to a history of overwriting information with respect to the conference information and adjusts the size to the size at the time of overwriting.   2. The electronic conference system according to claim 1, wherein when the conference information is moved, the position alignment unit aligns an overwrite position with respect to a window movement of the conference information.   The electronic conference system according to claim 1, wherein the position matching unit re-displays the overwrite information from the stored overwrite information to a position at the time of overwriting, and edit processing of the overwriting information is possible. A plurality of PC terminals and conference information display means are connected on the network, one of the plurality of PC terminals is a PC conference operation right terminal, the other PC terminal is a PC conference participation terminal, and the PC terminal is created. An electronic conference system for performing conferences by mutually outputting conference information on a screen,
An electronic conference system, comprising: a position matching storage unit that performs position matching by associating a positional relationship between the conference information and overwritten information overwritten on the meeting information.   When the display position of the conference information and the overwrite information is changed, the PC conference operation authority terminal displays the changed conference information and the overwrite information at the same position on the PC conference participation terminal. The electronic conference system according to claim 10.   The PC conference operation authority terminal displays the changed conference information and the overwrite information in the same size on the PC conference participation terminal when the sizes of the conference information and the overwrite information are changed. The electronic conference system according to claim 10.   When the horizontal scroll box position of the conference information and the overwrite information is changed, the PC conference operation right terminal makes the changed conference information and the overwrite information the same position on the PC conference participation terminal. The electronic conference system according to claim 10, wherein the electronic conference system is displayed.   When the vertical scroll box position of the conference information and the overwrite information is changed, the PC conference operation right terminal sets the changed conference information and the overwrite information to the same position to the PC conference participation terminal. The electronic conference system according to claim 10, wherein the electronic conference system is displayed. The PC conference operation right terminal, when overwriting the conference information, transmits the screen coordinates by the overwrite operation to the PC conference participation terminal,
The electronic conference system according to claim 10, wherein the PC conference participation terminal draws on a screen, converts to scroll space coordinates, and saves. The PC conference operation right terminal transmits the screen coordinates by the overwrite deletion operation to the PC conference participation terminal when overwriting the conference information.
The electronic conference system according to claim 10, wherein the PC conference participation terminal erases the screen and updates the overwrite information.   11. The electronic conference system according to claim 10, wherein the PC conference operation right terminal stores the conference information and overwrite information and redraws the position at the time of overwrite drawing.   The electronic conference system according to claim 10, wherein the PC conference operation right terminal re-displays the overwrite information from the saved overwrite information at a position at the time of overwriting, and edit processing of the overwriting information is possible. In an electronic conference system that generates conference information and displays conference information created on the PC terminal on the conference information display means,
When performing an overwrite operation on the conference material, a storage display means is provided for calculating an overwrite information position and storing and displaying the stroke data of the overwrite information in association with the position and page number of the conference material and the overwrite information. A featured electronic conference system.   20. The electronic conference system according to claim 19, wherein the storage display unit acquires an image of an overwrite page when the page list of the overwrite information is displayed.   20. The electronic conference system according to claim 19, wherein the storage display means reduces and displays the overwrite information at a position at the time of overwriting when the page list of the overwriting information is displayed.   The storage display means selects a page from the page list of the overwrite information, calculates a horizontal scroll box position displayed in a display area on the screen of the selected page, and moves the horizontal scroll box to the calculated position. The electronic conference system according to claim 19, wherein the selected page is displayed.   The storage display means selects a page from the page list of the overwrite information, calculates a vertical scroll box position displayed in a display area on the screen of the selected page, and moves the vertical scroll box to the calculated position. The electronic conference system according to claim 19, wherein the selected page is displayed.   The storage display unit selects a position in the page from the page list of the overwrite information, and displays the selected position in the vicinity of the center of the display area on the screen. The electronic conference system according to one.   25. The storage display unit according to any one of claims 20 to 24, wherein after displaying the information selected from the list of overwritten pages, the overwriting on the same page is redrawn at a position at the time of overwriting. Electronic conference system.   26. The electronic conference system according to any one of claims 20 to 25, wherein the storage display unit displays the image of the page selected from the overwrite page list and the overwrite information in full screen.   27. The electronic device according to claim 26, wherein the storage display means can add and delete overwrite information when displaying an image of the page selected from the overwrite page list and the overwrite information on a full screen. Conference system.

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