JPH10229463A - Electronic blackboard - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a large screen that can reduce deterioration in display contrasts due to ambient illumination, while reducing its depth by placing a transparent sheet which is cyclically driven on the front face of a display device consisting of a plasma display panel, reading the characters, images, etc., on the surface of the transparent sheet by an optical sensor, and printing these characters, images, etc., after compositing them with the data on the display device. SOLUTION: An endless transparent sheet 3 is placed in front of a blackboard face 2, and a user writes the characters or graphic forms on the sheet 3 by means of a writing tool such as a signature pen, etc., that can be pulled out. The sheet drive rollers 6a to 6f wind round the sheet 3 and cyclically drive it. A plasma display panel 5 displays the images and also functions as an underlay of the sheet 3. When the user gives an instruction via a switch, the sheet 3 is wound around in a single direction showing its new surface. In this process, a CCD sensor 7 reads characters, graphic forms, etc., on the passing sheet 3 and sends them to a printer via a computer.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an endless circulating transparent writable sheet, a display panel for displaying data sent from a computer, information written on the transparent sheet, and information displayed on the display panel. And a printer that prints the information together with the information.

[0002]

2. Description of the Related Art Conventional electronic blackboards of the same kind are provided with a screen on a blackboard surface as a display method of a display surface, and an image projected from a projector provided outside the blackboard onto the screen, or a blackboard surface. Provided with a liquid crystal display (hereinafter, referred to as LCD). Further, a blackboard surface is constituted by a pressure-sensitive panel, and a device having a function of electrically reading characters and figures written on the panel has been put to practical use.

As an example of the same type of publication, Japanese Utility Model Laid-Open No. 02-07
5687. The present invention has a transparent pressure-sensitive panel, an LCD panel for displaying the contents of a cardboard, and a switch for canceling the display, so that display information can be displayed on / off without a whiteboard marker or cloth. Can be freely selected.

[0004]

In the case of the above-mentioned conventional apparatus, the problem when the display panel is of a liquid crystal rear projector type is that since a certain distance is required from the projection device to the display panel, a reflection mirror or the like is required. In some cases, the depth of the electronic blackboard itself is increased. In the case of a liquid crystal front projector type display panel, it is necessary to install the projection device at a position away from the electronic blackboard, so that the installation is restricted. Further, there is a drawback that the projection opening portion of the projector becomes dazzling due to the reflection of the image projection light by the transparent sheet surface on the blackboard surface. Further, in the case of using an LCD for the display panel, it is difficult to increase the size of the LCD panel. The blackboard surface is composed of a pressure-sensitive panel, which has the function of electrically reading the characters and figures written on this panel.Because the electrode wiring is embedded in the writing surface sheet, the sheet Has a drawback that it is difficult to adopt a winding structure, so that the writing surface is limited to one surface.

The present invention has been made in view of such circumstances, and has a depth similar to that of an electronic blackboard having no image display function, is easy to move and install, and lowers the contrast of the display surface due to indoor lighting or the like. It has a display panel with less noise, does not lower the brightness around the screen compared to the LCD rear projector type screen, reads characters and figures written on a transparent sheet, reads the read video signal and the image signal displayed on the blackboard surface It is an object of the present invention to provide an electronic blackboard having a structure in which the transparent sheet is wound up and a plurality of writable surfaces are formed by generating a video screen signal in which the two are combined, and by winding the transparent sheet.

[0006]

According to the first aspect of the present invention,
A display device connected to the computer for displaying data sent from the computer, a display control circuit for controlling the display device, a writable transparent sheet provided on the front surface of the display device, A sheet driving device for circulating the sheet, an optical sensor for reading characters and pictures on the surface of the transparent sheet, characters and figures read by the optical sensor, and data sent from the computer to the display device. A printing device for combining and printing;
An electronic blackboard comprising: According to a second aspect of the present invention, in the electronic blackboard according to the first aspect, the display device is a plasma display panel. According to a third aspect of the present invention, in the electronic blackboard according to the first aspect, the transparent sheet is formed in an endless shape. The invention according to claim 4 is the electronic blackboard according to claim 1, wherein the optical sensor is a charge-coupled device. The invention according to claim 5 is the electronic blackboard according to claim 1,
The optical sensor is provided in a part of a circulation path of the transparent sheet, and sequentially reads the sheet from a moving sheet.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an electronic blackboard according to an embodiment of the present invention will be described with reference to the drawings. 1 is a sectional view of the configuration of the electronic blackboard according to the embodiment, FIG. 2 is a front view of the electronic blackboard according to the embodiment, FIG. 3 is a screen display example of the electronic blackboard according to the embodiment, and FIG. It is a signal synthesis system diagram of a blackboard. In FIG. 1, reference numeral 1 denotes an electronic blackboard, and reference numeral 2 denotes a blackboard surface.
A roll-up endless transparent sheet 3 is provided. The user writes characters and figures on the surface of the transparent sheet 3 with a writing implement such as a felt-tip pen that can be wiped off. The transparent sheet 3 is wound around sheet driving rollers 6a to 6f, and is driven to circulate along a predetermined traveling path. Reference numeral 5 denotes a plasma display panel (hereinafter, referred to as a PDP), which is not shown.
In addition to displaying an image by the display control circuit described above, the display control circuit is disposed on the back surface of the transparent sheet 3 and also serves as an underlay of the transparent sheet 3. Reference numeral 7 denotes a CCD for reading.
The sensor reads characters and graphics written on the transparent sheet 3 as electrical signals by photoelectric conversion when the sheet passes in front.

Next, in FIG. 2, reference numeral 21 denotes a whiteboard, which is located at the same position as the PDP 5, and
Occupies a portion where the PDP 5 is not provided, and also functions as an underlay when writing with a writing instrument on the transparent sheet 3 on the white board 21. Reference numeral 22 denotes a printer, which prints together information read by the CCD sensor 7 with characters and graphics written on the transparent sheet 3 and information displayed on the PDP 5. Next, in FIG.
5 is an image display surface. Reference numeral 31 denotes an image pattern displayed on the image display surface 32. This image pattern 31 is transmitted through the transparent sheet 3 and visually recognized by a user. Symbol 33
Are handwritten characters written on the surface of the transparent sheet 3 by the user.

Next, in FIG. 4, reference numeral 41 denotes a personal computer (hereinafter, referred to as a personal computer) which sends image information generated and edited to the PDP 5 as display data. Reference numeral 42 denotes a display screen signal, which is an image signal output from the personal computer 41 and sent to the PDP 5. Reference numeral 43 denotes a blackboard surface reading signal, which is an image signal obtained by reading characters and graphics written on the transparent sheet 3 by the CCD sensor 7 and is the same as a printing signal output to the printer 22. Reference numeral 44 denotes an A / D converter, which converts a blackboard surface read signal 43 into an analog input signal, converts the analog input signal into a digital signal, and outputs the digital signal to the personal computer 41 as a blackboard surface read digital signal 45.

Subsequently, the operation of the embodiment of the present invention will be described. In a conference or the like, a signal synthesizing system including an electronic blackboard according to the present invention is an example in which a schedule as shown in FIG. 3 is displayed to a participant and a presenter writes necessary items in blanks of the schedule. Description will be made with reference to FIG.
First, on the personal computer 41, a portion other than the handwritten characters 33 (characters of the large schedule, the lens, the mechanism, etc.) in the schedule of FIG. 3 is created and output as a display screen signal 42. This display screen signal 42 is input to the electronic blackboard 1,
The image is displayed on the PDP 5 by a PDP display control circuit (not shown). The frames and characters (characters such as the schedule 10, 10, 11... 2) in FIG.
This is transmitted through the transparent sheet 3 and visually recognized by the participant as a display on the electronic blackboard. The presenter writes necessary information in a blank portion of the schedule table on the PDP 5 on a transparent sheet 3 arranged on the front of the PDP 5 by using a writing tool such as a wiping marker pen. In the example of FIG. 3, the handwritten character 33 corresponds thereto (hereinafter, this is referred to as handwritten information).

Next, a case where the presenter prints image information combining display information on the PDP 5 and the handwritten information on the transparent sheet 3 will be described. First, by pressing a dedicated switch on the electronic blackboard 1, the sheet driving rollers 6a to 6a are pressed.
6f starts driving, whereby the transparent sheet 3 is wound up in one direction, and the portion exposed on the blackboard surface 2 becomes a new surface on which nothing is written. During this winding operation, the characters and figures handwritten on the transparent sheet 3 are read by the CCD sensor 7 fixedly installed in the middle of the transparent sheet winding process. Both the read handwritten information and the same information as the image information displayed on the PDP 5 are sent to the printer 22, where they are printed on one sheet.

Thereafter, the above-mentioned 2 sent to the printer 22
Only the handwritten information among the kinds of information is sent to the A / D converter 44 as the blackboard surface reading signal 43. Here, the handwritten information, which was analog information, is converted by the A / D converter 44 into digital information. This is sent to the personal computer 41 as a blackboard surface reading digital signal 45.
In the personal computer 41, the blackboard surface reading digital signal 45 and the display screen signal 42 are combined into one-sided image information, and sent to the PDP 5 again as a new display screen signal 42. By displaying the new display screen signal 42 in the PDP 5, the screen displayed on the PDP 5 and the handwritten screen before the update are displayed on the PDP as one new screen.

[0013]

As described above, according to the electronic blackboard of the present invention, the following effects can be obtained. 1. Since a PDP is used as a display device of the electronic blackboard, a large screen having a small depth and a large area is possible, and a decrease in contrast of a display surface due to ambient lighting is small, and brightness at a peripheral portion of the screen is not reduced. Easy to move and install. 2. Since the display information is sent from the connected personal computer, it is possible to display, on the blackboard, a drawing for presentation created on the personal computer and online information obtained in real time through communication. 3. An endless transparent sheet for handwriting input is arranged in contact with the front of the PDP as a display screen, so characters and figures can be displayed over multiple surfaces on the transparent sheet in a state of being superimposed on the screen of the PDP. It is possible to input by handwriting or the like. 4. With the attached printer, the PDP screen and the handwritten input information can be combined and printed on one sheet.

[Brief description of the drawings]

FIG. 1 is a cross-sectional configuration diagram of an electronic blackboard according to an embodiment of the present invention.

FIG. 2 is a front view of an electronic blackboard according to an embodiment of the present invention.

FIG. 3 is a screen display example of an electronic blackboard according to an embodiment of the present invention.

FIG. 4 is a diagram illustrating a signal synthesizing system of an electronic blackboard according to an embodiment of the present invention.

[Description of Signs] 1 ... Electronic blackboard, 2 ... Blackboard surface, 3 ... Transparent sheet, 5 ... Plasma display panel (PDP), 6a, 6b, 6c, 6d, 6e, 6f ... Sheet driving roller, 7 ... CCD Sensor: 21: Whiteboard, 22: Printer, 31: Image pattern, 32: Image display surface, 33: Handwritten characters, 41: Personal computer, 42: Display screen signal, 43: Blackboard surface read signal, 44: A / D conversion , 45 ... Blackboard surface reading digital signal

Claims (5)

[Claims] 1. A display device connected to a computer for displaying data sent from the computer, a display control circuit for controlling the display device, and a writable transparent layer provided on a front surface of the display device. A sheet, a sheet driving device that circulates and drives the transparent sheet, an optical sensor that reads characters, figures, and the like on the surface of the transparent sheet; a character, a figure, and the like read by the optical sensor; A printing device that combines the sent data and prints the combined data. 2. The electronic blackboard according to claim 1, wherein said display device is a plasma display panel. 3. The electronic blackboard according to claim 1, wherein said transparent sheet is formed in an endless shape. 4. The electronic blackboard according to claim 1, wherein said optical sensor is a charge-coupled device. 5. The electronic blackboard according to claim 1, wherein the optical sensor is provided in a part of a circulation path of the transparent sheet and sequentially reads the moving sheet.