JP2014004783A - Electronic blackboard and display control method of the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electronic blackboard which, even when much information has input by handwriting, enables simultaneous reference to information without lowering visibility.SOLUTION: An electronic blackboard 1 according to this invention includes a display device 3 provided with a display surface which displays characters and images, and an input device 2 provided overlying the display device, where handwritten information input at the input device 2 is displayed substantially at the same position as the input position on the display surface. The electronic blackboard comprises: a handwritten information acquisition unit 11 which acquires handwritten information and input time from the input device 2 and stores it; a handwritten information monitoring unit 13 which calculates and monitors an elapsed time from the input time of the handwritten information; a handwritten display change unit 14 which changes transmittance of the handwritten information to a prescribed transmittance according to the lapsed time; and a display image generation unit 12 which displays the handwritten information on the display device with the prescribed transmittance.

Description

  The present invention relates to an electronic blackboard having a handwriting input function and a display control method thereof.

  Conventionally, an electronic blackboard using a large display equipped with a touch panel has been used. The electronic blackboard accepts handwritten input such as characters or symbols by the user by touching the touch panel with a finger or a touch pen, and displays the handwritten information at the position. Such an electronic blackboard is effective when a user gives an explanation to a plurality of people, such as a presentation, a meeting, or an education.

  For example, as shown in FIG. 6, the electronic blackboard 21 disclosed in Patent Document 1 displays a position detection device 22 that detects the position of the abutted member 20 and a position of the member detected by the position detection device 22. A display device 23 to be controlled, and a control means for controlling the position detection device 22 and the display device 23.

  The electronic blackboard 21 records the trajectory drawn on the position detection device 22 for each page, and calls a page with a trajectory by page operation to call a new page without erasing the previous miracle, The page drawn in can be called immediately.

JP 2005-335156 A

  However, the electronic blackboard disclosed in Patent Document 1 has a problem in that, since the trajectory drawn on the position detection device 22 is recorded for each page, different trajectories with different pages cannot be referred to at the same time. Further, when a plurality of trajectories are recorded on the same page, there is a problem that the trajectories overlap and are difficult to see.

  The present invention has been made in view of such circumstances, and provides an electronic blackboard that can simultaneously refer to a plurality of handwritten information without being difficult to see even if the amount of information input by handwriting increases. It is.

  In order to solve the above problems, an electronic blackboard according to the present invention includes a display device having a display surface for displaying characters and images, and an input device provided to overlap the display surface. A handwritten information acquisition unit for acquiring and storing handwritten information and an input time from an input device, wherein the input handwritten information is displayed at substantially the same position as the position input on the display surface; The handwritten information monitoring unit that calculates and monitors the elapsed time from the input time, the handwritten display change unit that changes the transmittance of the handwritten information to a predetermined transmittance according to the elapsed time, and the handwritten information with the predetermined transmittance A display image generation unit to be displayed on the display device is provided.

  In addition, the handwriting display changing unit increases the transmittance of the handwritten information as the elapsed time of the handwritten information is longer.

  In addition, it has a reset function that selects old handwritten information displayed with the changed transmittance and restores the transmittance of the old handwritten information to the original. Is changed to the current time, and the transmittance of the old handwritten information is changed to 0% by the handwritten display changing unit.

  The electronic blackboard display control method of the present invention includes a handwritten information input step for inputting handwritten information, a handwritten information display step for displaying handwritten information on the electronic blackboard, and a handwriting for monitoring an elapsed time when the handwritten information is displayed. It comprises an information monitoring step and a handwriting display change step for changing the transmittance of handwritten information to a predetermined transmittance according to the elapsed time and displaying it.

  In addition, the electronic blackboard display control method of the present invention includes a handwriting information selection step of selecting old handwritten information displayed with a changed transmittance, and a process of resetting the elapsed time of the selected old handwritten information to 0 minutes. It includes a time initialization step and a transmittance initialization step for resetting the transmittance of the selected old handwritten information to 0%.

  According to the electronic blackboard of the present invention, it is possible to refer to a plurality of information input by handwriting simultaneously without making it difficult to see.

It is a schematic diagram which shows the display of the handwritten information by the electronic blackboard of this invention. It is a block diagram which shows the structure of the electronic blackboard of this invention. It is a figure which shows a handwritten information table and a handwritten display change table. It is a flowchart which shows the display method of the handwritten information of the electronic blackboard of this invention. It is a flowchart which shows another display method of the handwritten information of the electronic blackboard of this invention. It is a schematic diagram which shows the electronic blackboard of patent document 1. FIG.

  An embodiment of the present invention will be described with reference to FIGS. The configuration described in detail below is merely a specific example of the present invention, and the present invention is not limited to this.

  FIG. 1 is a schematic diagram showing a state in which a plurality of handwritten information HW1 to HWnn (n: represents a natural number, writing order) are displayed on the electronic blackboard 1 according to the first embodiment of the present invention. The electronic blackboard 1 of the present invention includes an input device 2 such as a touch panel, a display device 3 such as a display, and an image processing device 4. In the electronic blackboard 1, the input device 2 is arranged so as to overlap the character and image display surface of the display device 3, and the handwritten information HWn written by the input device 2 is image-processed by the image processing device 4 to display the display device. 3 is displayed at substantially the same position as the input position.

  As shown in FIG. 1, the electronic blackboard 1 of the present invention is characterized in that the handwritten information HW1 to HW4 written sequentially is displayed on the display device 2 with a transmittance corresponding to the elapsed time after writing. Specifically, the old handwritten information HWn that has been written for a long time is displayed with a lower transmittance and lighter display, for example, even if it overlaps the original display image or the new handwritten information HWn that has just been written. It can be made difficult to see as an image.

  FIG. 2 is a block diagram showing a configuration of the electronic blackboard 1 of the present invention. The electronic blackboard 1 includes an input device 2, a display device 3, and an image processing device 4. The image processing device 4 performs image processing and passes handwritten information HWn between the input device 2 and the display device 3, and includes a handwritten information acquisition unit 11, a display image generation unit 12, a handwritten information monitoring unit 13, and A handwritten display changing unit 14 is provided.

  The handwritten information acquisition unit 11 sequentially acquires the handwritten information HWn written by the input device 2, and stores each of the handwritten information HW1 to HWn in the storage device together with the time when the handwritten information is input. The handwritten information HW1 to HWn stored in the storage device and the respective input times are associated, for example, as in the handwritten information table 15 shown in FIG.

  When new handwritten information HWn is acquired by the handwritten information acquiring unit 11, the display image generating unit 12 illustrated in FIG. 2 adds the new handwritten information HWn to the display image and outputs the updated display image to the display device 3. To do. For the old handwritten information HWn that has already been added, the handwritten display changing unit 14 described later changes the transmittance when displaying the handwritten information Hwn to a specified value, and displays the updated display image on the display device 3. Output to.

  The handwritten information monitoring unit 13 calculates the elapsed time that has elapsed since the writing of the respective handwritten information HW <b> 1 to HWn from the current time and the input time stored in the handwritten information table 15. Further, when the handwritten information HWn has passed a predetermined time, the handwritten information HWn is sent to the handwritten display changing unit 14 together with the elapsed time.

  The handwritten display changing unit 14 changes the transmittance when displaying the handwritten information HWn according to the elapsed time, and instructs the display image generating unit 12 to update the display image. The transmittance when displaying the handwritten information HWn is changed based on, for example, the handwritten display change table 16 shown in FIG. As shown in the handwriting display change table 16, by increasing the transmittance of the handwritten information HWn as time elapses from writing, the old handwritten information HWn becomes inconspicuous and new handwritten information HWn is added. Even if they overlap, it is possible to prevent the display image from becoming difficult to see.

  Note that the numerical values in the handwritten display change table 16 shown in FIG. 3B are examples, and the elapsed time and transmittance values can be set as appropriate in consideration of the ease of viewing as a display image. However, the transmittance after the elapse of a predetermined time is not increased until the handwritten information HWn is completely transmitted (transmittance 100%), and the position of the writing information HWn can always be discriminated even after the transmittance is changed. It is desirable. For example, when a user inputs some external signal such as a double click at the position of the handwritten information HWn whose transmittance has been changed, the old writing is performed by returning to the display of the transmittance of 0% which is the state at the time of writing. The information HWn can be easily viewed and reused.

  FIG. 4 is a flowchart illustrating a method for displaying the handwritten information HWn on the electronic blackboard 1 according to the first embodiment of the present invention. The steps from the start to the end of the handwriting input mode of the electronic blackboard 1 will be described with reference to the flowchart shown in FIG. 4, but the electronic blackboard 1 can be used as a state in which handwriting input is always possible.

  First, when the handwriting input mode is selected on the electronic blackboard 1, the process proceeds to step S1 and enters a state of waiting for handwriting input. In step S1, the handwriting input mode is terminated when a state in which no handwriting input is performed on the input device 2 for a predetermined time (for example, 30 minutes) continues.

  When handwritten input is performed on the input device 2, the process proceeds to step S <b> 2, and the input handwritten information HWn and the input time are stored in the handwritten information table 15. At this time, the handwritten information acquisition unit 11 determines that the input is completed when a state in which no input has been made in the input device 2 continues for a predetermined period (for example, 30 seconds), and the information written during that period is converted into one handwritten information HWn. And the time is acquired as the input time.

  In step S3, the acquired handwritten information HWn is added to the display image by the display image generation unit 12, and the display image in which the handwritten information HWn is updated in step S4 is output to the display device 2. After that, the process returns to step S1 and waits for the next handwriting input.

  On the other hand, after the handwritten information HWn is displayed on the display device 2, the elapsed time of the handwritten information HWn is calculated in the procedure of the transmittance change mode shown in A to B of FIG. 4, and the handwritten information HWn is calculated according to the elapsed time. The transmittance of is changed.

  In step S <b> 5, the elapsed time of the displayed handwritten information HW is monitored by the handwritten information monitoring unit 13. The elapsed time of the handwritten information HWn is calculated by subtracting the current time and the input time stored in the handwritten information table 15.

  In step S6, the elapsed time of the handwritten information HWn is compared with a predetermined time in the handwritten display change table 16, and the handwritten information HWn that has passed the predetermined time is stored in the display device 3 based on the handwritten display change table 16 in step S7. The transmittance at the time of display is changed to 10 to 90%.

  Note that the maximum value of the transmittance is not changed to 100% (completely transparent) because the old handwritten information HWn can be recognized on the display screen in resetting the transmittance of handwritten information described later, and the reset target can be selected. It is for doing so.

  The handwritten information HWn whose transmittance has been changed is updated as a display image and redisplayed on the display device 3 through steps S3 and S4. The re-displayed handwritten information HWn is displayed with a lighter and lighter transmittance as the elapsed time is longer, so the old handwritten information HWn is less noticeable, and even if new handwritten information HWn is added and displayed, It is possible to prevent the display image from becoming difficult to see.

  As described above, the electronic blackboard 1 of the present invention can prevent the display image from becoming difficult to see even if old handwritten information and new handwritten information are mixed. For example, old electronic handwritten information and new handwritten information can be displayed. In such a case, it is necessary to reset the transmittance of handwritten information to 0%, which is the transmittance at the time of input, in order to display old handwritten information so that it can be easily seen again.

  FIG. 5 is a flowchart for explaining a reset mode of the transmittance of old handwritten information. In the entire flow shown in FIG. 4, the resetting of the transmittance is performed in the reset mode (steps S8 to S8) from A ′ to B ′ in FIG. 5 instead of the transmittance changing mode (steps S5 to S7) from A to B. It is reset by executing S10). Note that the start point A ′ and the end point B ′ in the reset mode indicate the same positions as the start point A and the end point B in the change mode in the overall flow of FIG.

  First, in step S8, old handwritten information HWn to be reset is selected. The handwritten information may be selected by displaying a list of old handwritten information HWn input so far and selecting from the list. In addition, since the old handwritten information does not disappear even when the elapsed time exceeds a certain time (the maximum transmittance is 90%), for example, the old handwritten information HWn on the display screen is directly selected by double-clicking or the like. By doing so, the operability can be improved.

  When the old handwritten information HWn is selected, the process proceeds to step S9, and the handwritten information acquisition unit 11 resets the elapsed time of the old handwritten information HWn. At this time, the old handwritten information HWn is reset to 0 minutes in the same manner as the new handwritten information by rewriting the input time stored in the handwritten information table 15 to the current time.

  In step 10, the handwriting display changing unit 14 receives a transmittance reset instruction (broken line arrow in FIG. 2) from the handwritten information acquiring unit 11, and returns the transmittance changed according to the elapsed time to 0%. The old handwritten information HWn whose transmittance has returned to 0% is updated as a display image through the steps S3 and S4 in the display image generation unit 12, and is re-displayed on the display device 3.

  As described above, the reset old handwritten information HWn starts to be newly counted from 0 minute, and the changed transmittance is returned to 0% and displayed darkly. It is displayed in an easy-to-view manner and can be reused.

1,21 Electronic blackboard 2,22 Input device (touch panel)
3, 23 Display device
DESCRIPTION OF SYMBOLS 4 Image processing apparatus 11 Handwritten information acquisition part 12 Display image generation part 13 Handwritten information monitoring part 14 Handwritten display change part 15 Handwritten information table 16 Handwritten display change table

Claims (5)

A display device having a display surface for displaying characters and images;
It is composed of an input device provided to overlap the display surface,
The electronic blackboard in which the handwritten information input by the input device is displayed at substantially the same position as the position input on the display surface,
A handwritten information acquisition unit that acquires and stores the handwritten information and input time from the input device;
A handwritten information monitoring unit that calculates and monitors an elapsed time from an input time of the handwritten information;
A handwriting display changing unit that changes the transmittance of the handwritten information to a predetermined transmittance according to the elapsed time;
An electronic blackboard comprising a display image generation unit that displays the handwritten information on the display device at the predetermined transmittance.   The electronic blackboard according to claim 1, wherein the handwritten display changing unit increases the transmittance of the handwritten information as the elapsed time of the handwritten information is longer. Select the old handwritten information displayed with the changed transmittance, and have a reset function to restore the transmittance of the old handwritten information,
The reset function rewrites the input aging of the old handwritten information to the current time in the handwritten information acquisition unit,
The electronic blackboard according to claim 1 or 2, wherein a transmittance of the old handwritten information is changed to 0% by the handwritten display changing unit. A handwritten information input step for inputting handwritten information on the electronic blackboard;
A handwritten information display step for displaying the handwritten information on the electronic blackboard;
A handwritten information monitoring step for monitoring an elapsed time during which the handwritten information is displayed;
A display control method for an electronic blackboard, comprising: a handwriting display changing step of changing and displaying the transmittance of the handwritten information to a predetermined transmittance according to the elapsed time. A handwriting information selection step of selecting old handwritten information displayed with changed transmittance;
An elapsed time initialization step for resetting the elapsed time of the selected old handwritten information to 0 minutes;
The electronic blackboard display control method according to claim 4, further comprising: a transmittance initialization step of resetting the transmittance of the selected old handwritten information to 0%.