JPH0651934A - Electronic blackboard - Google Patents

Abstract

PURPOSE:To prevent the erase of secret items or the like from being missed by displaying the presence/absence of plotted contents in a page, which is not observed when a screen is moved, and easily recognizing the presence/absence of plotting without moving all the pages on the screen. CONSTITUTION:This electronic blackboard or the like is composed of a pair of left and right plotted contents reading mechanisms 1, 2 provided at parts corresponding to the moving direction of the screen adjacently to a part where the plottable page appears, plotted content presence/absence detecting means 6 to detect whether the plotted contents exist in the page while receiving signals from the plotted content reading mechanism in a direction where the plotted contents on the page are not observed when the screen is moved, and plotted content presence/absence display means 7 to display the existence of plotted contents in the page when the detecting means detects it, and to display the absence of plotted contents in the page corresponding to that page which enables plotting with the movement of the screen.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic blackboard, and more particularly to an electronic blackboard for drawing on a moving screen.

[0002]

2. Description of the Related Art Conventionally, in this kind of electronic blackboard, the contents of several pages can be read and written by moving the screen, and the contents drawn on the screen can be moved by moving the screen. It can be read and output as a hard copy.

[0003]

In the above-mentioned conventional electronic blackboard, the user confirms whether or not the page was rendered invisible due to the movement of the screen (after using the electronic blackboard at a meeting or the like. , If you need to check whether confidential information is written and erase it, or if you have erased what you wrote as a manner), you need to move all the pages of the screen again and check the drawing content, There is a problem that it is troublesome, time consuming, and complicated.

[0004]

The electronic blackboard of the present invention is a screen for moving and drawing, and a pair of drawing contents read on the edges of the screen in the moving direction of the screen where the drawable page appears. Mechanism, detection means for receiving a signal from the drawing content reading mechanism in the direction in which the screen moves, and detecting whether or not there is drawing content on the page that becomes invisible due to the movement of the screen, and drawing upon receiving the signal from this detection means Display means for displaying the presence of screen content for a page that has content and is not located as a drawable page.

[0005]

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

FIG. 1 is a block diagram of an embodiment of the present invention.

In FIG. 1, a drawing content reading mechanism (left)
1 and a drawing content reading mechanism (right) 2 are both CCD
It is composed of an image reading device. It is possible to draw on the left and right moving screen 3 with a pen or the like. The screen moving mechanism 4 drives the left-right moving screen 3 to move the screen left and right. The screen movement control mechanism 5 controls the screen movement mechanism 4, and at the same time, informs the drawing content presence / absence detecting means 6 of the information on the moving page of the screen 3, the start / end of movement, and displays the drawing content presence / absence. The means 7 is informed of the information on the moving page of the screen.

The drawing content presence / absence detecting means 6 is a means for receiving signals from the drawing content reading mechanisms 1 and 2 and detecting whether or not there is drawing content on the moving page of the screen 3, and is a memory for storing images or a memory. It is composed of a processor that checks the above image and determines whether or not there is drawing. The drawing content presence / absence display unit 7 is a unit for displaying the presence / absence of the drawing content in accordance with an instruction from the screen movement control mechanism 5 or the drawing content presence / absence detecting unit 6,
The display device is provided with LEDs and the like corresponding to each page (here, pages 1 to 4) of the screen 3.

Next, the control flow of the present embodiment will be described using the example shown in FIG. 2 (a) to 2 (g) show the operation procedure, and the four rectangles on the left side of each of (a) to (g) show each page of the screen 3, and the numbers in the rectangles showing the page numbers are normal. Characters mean pages without drawing contents, and white characters mean pages with drawing contents. The left side of each of (a) to (g) shows a drawing content presence / absence display means, a black circle shows an LED of a lit bear, and a white circle shows an LED of an off state.

In FIG. 2, it is assumed that the screen is made up of four pages and that "page 4" is now positioned as a readable / writable surface (a). That is, pages 1 to 3 are invisible in the device. Here, when the user gives an instruction to draw characters and figures on page 4, move the pages, and display the figure on page 3 as a readable and writable surface,
The screen movement control mechanism 5 instructs the screen movement mechanism 4 to move the screen 3 to the right, and at the same time, instructs the drawing content presence / absence detection means 6 to move the screen in the direction (right), move page (4 pages), and start movement. Tell.

The drawing content presence / absence detecting means 6 receives a signal from the drawing content reading mechanism (right) 2 and whether or not there is drawing content on four pages until receiving a screen movement end instruction from the screen movement control mechanism 5. To detect. In this case, the drawing content presence / absence detection unit 6 instructs the drawing content presence / absence display unit 7 because there are drawing contents on four pages.
The LED corresponding to the page is turned on to inform the user that there are drawing contents on page 4 (b). FIG. 2B shows a state in which the user is informed that there are drawing contents on pages 4 and 2 by performing similar processing.
During this period, the screen movement control mechanism 5 instructs the drawing content presence / absence display unit to turn off the LED corresponding to the page which is newly read / writable by the screen movement. Since it is not drawn in, the operation of turning off the LED is ignored.

Next, the case where the screen is moved to the left from the state of FIG. 2B will be described. The process is similar to the above-mentioned process, except that when the screen is moved to the left, the presence or absence of the drawing content is detected by the signal from the drawing content reading mechanism (left) 1. Further, in FIG. 2B, although the second page has drawing contents (LED is lit), the second page becomes a readable / writable page by moving the screen. Therefore, the second page is instructed by the screen movement control mechanism 5. The LED corresponding to is turned off (e).

[0013]

As described above, according to the present invention, in the electronic blackboard, the presence or absence of the drawing contents of the page that becomes invisible due to the screen movement is detected, and the result can be displayed. Without having to do so, it is possible to easily see the presence or absence of drawing, and to prevent forgetting to erase confidential information.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention.

FIG. 2 is a diagram showing a relationship between movement of the screen 3 shown in FIG. 1 and display of a drawing content presence / absence display unit 7.

[Explanation of symbols]

 1 Drawing Content Reading Mechanism (Left) 2 Drawing Content Reading Mechanism (Right) 3 Horizontal Moving Screen 4 Screen Moving Mechanism 5 Screen Moving Control Mechanism 6 Drawing Content Presence / Absence Detection Unit 7 Drawing Content Presence / Absence Display Unit

Claims (1)

[Claims] 1. A screen that is moved and drawn, a pair of drawing content reading mechanisms provided on the edges of the screen in the moving direction of a portion where a drawable page of the screen appears, and the screen moving direction. A detection unit that receives a signal from the drawing content reading mechanism to detect whether the drawing content exists on the page that becomes invisible due to the movement of the screen, and a signal that is received from the detection unit and the drawing content exists and is positioned as a drawable page. An electronic blackboard comprising: a display unit for displaying the presence of screen contents on a page that is not displayed.