JP2003136892A - Electronic blackboard - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electronic blackboard in which as a plasma display, a back-projecting type display and the like are not used, the manufacturing cost can be decreased and the productivity is excellent and as a commercially available general-purpose projector and the like can be set on the electronic blackboard and displaying can be performed by back-projection, there exists no possibility of generating the shadow of an explainer or the like standing at the front of the electronic blackboard on a screen of projection and visibility is excellent. SOLUTION: A stand part 2a, a displaying and mentioning face 2 formed by a back-projecting type screen stood and held by means of the stand part 2a and displaying letters, figures and the like by means of the back-projection, a projector installing part 7 installed with a back-projecting type projector 3 and arranged at an upper part or a lower part or a specified part of the displaying and mentioning face 2 and a back-projecting optical system 6 arranged on the back face side of the displaying and mentioning face 2 and reflecting an image light projected from the projector 3 and performing back- projection on the displaying and mentioning face 2 are provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic blackboard which has a function of copying it on a writing surface with a water-based pen, and more particularly to an electronic blackboard excellent in space saving in an installation place or a storage place.

[0002]

2. Description of the Related Art Conventionally, electronic blackboards have been used in many meetings, such as meetings and presentations, and it is possible to copy the contents on the spot for the preparation of minutes and promote the meetings effectively. Has been done. In recent years, not only has a function of copying on the written surface with a water-based pen and copying the written content, but by detecting the position of the dummy pen using ultrasonic waves, etc., the written content can be directly electrically used as a personal computer or the like. An interactive blackboard (hereinafter referred to as "interactive blackboard") has been developed that has been interactively incorporated into. All such interactive electronic blackboards have a position detection unit that uses ultrasonic waves, infrared rays, a pressure sensor, or the like, and handwriting can be performed using a dedicated dummy pen or finger. However, in such an interactive electronic blackboard, it is necessary to write by hand on a writing surface with an ordinary water-based pen or the like when preparing for a meeting, etc., which requires a great deal of time and is inefficient. Further, since the water-based pen is a consumable item, it lacks usability, and further, there is a problem that a large amount of ink waste is generated when the written characters and figures are erased by erasing with an eraser.

In order to improve such problems, in recent years, data of a personal computer is displayed on a plasma display or a rear projection type display, or is projected and displayed on a display surface such as a screen using a projector. Interactive interactive blackboards have been developed that have the ability to do so. When such an interactive electronic blackboard is used, the data of the personal computer can be displayed on the display surface, so that it is not necessary to write it by hand when preparing for a meeting, etc., and it has excellent usability and convenience. It was

[0004]

However, the conventional electronic blackboard has the following problems. (1) A display having a plasma display or a rear projection display has a problem in that the display itself is very expensive, so that the manufacturing cost rises and the productivity is insufficient. (2) A projector that has a projector and displays images by front-projecting it on a display surface such as a screen that also serves as a writing surface is used by a person standing in front of the display surface of an electronic blackboard or when writing by hand. When the shadow is generated, the displayed image is difficult to see and there is a problem that the visibility is poor.

The present invention solves the above-mentioned conventional problems. Since a plasma display, a rear projection display, etc. are not used, the manufacturing cost can be reduced and the productivity is excellent. Since the display can be performed by rear projection after being set on the electronic blackboard, it is an object of the present invention to provide an electronic blackboard having excellent visibility without causing a shadow of an explainer standing in front of the electronic blackboard on the projection screen. .

[0006]

In order to solve the above-mentioned problems, an electronic blackboard of the present invention is a rear projection type of a stand portion and a character which is displayed upright by the stand portion and displayed by rear projection. A display marking surface formed by a screen and a rear projection type projector for projecting image light to display characters, drawings, etc. on the display marking surface are installed and arranged above or below the display marking surface or in a predetermined portion. And a rear projection optical system that is disposed on the back side of the display writing surface and reflects the image light projected from the projector installed on the projector setting portion and rear-projects the image light onto the display writing surface. And has a configuration including.

With this configuration, since a plasma display, a rear projection type display or the like is not used, the manufacturing cost can be reduced and the productivity is excellent, and a commercially available general-purpose projector or the like is set on the electronic blackboard to perform rear projection display. Therefore, it is possible to provide an electronic blackboard having excellent visibility without causing a shadow of an explainer standing in front of the electronic blackboard on the projection screen.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION The electronic blackboard according to claim 1 of the present invention is formed of a stand portion and a rear projection type screen which is vertically held by the stand portion and displays characters and drawings by rear projection. A display writing surface, and a projector installation unit provided with a rear projection type projector that projects video light to display characters, drawings, etc. on the display writing surface, and is arranged above or below the display writing surface or in a predetermined portion. And a rear projection optical system that is disposed on the back side of the display writing surface and that reflects the image light projected from the projector installed in the projector installation section and rear-projects the image light onto the display writing surface. .

With this configuration, the following operation is achieved. (1) Since the projector installation unit is provided, a commercially available general-purpose projector can be installed in the projector installation unit, and image light from the projector can be rear-projected and displayed on the display writing surface via the rear-projection optical system. it can. (2) Since the image from the projector installed in the projector installation section can be rear-projected and displayed on the display writing surface via the rear projection optical system, an instructor or a description can be displayed on the front side of the display writing surface of the electronic blackboard. Even if a person stands, the shadow does not occur on the display writing surface, and the visibility of the image displayed on the display writing surface, the written characters, the drawing, and the like can be improved. (3) Since the rear projection optical system is disposed on the back side of the display surface and the projector installation section is disposed above or below the display surface, the rear projection optical system is installed from the projector installed in the projector installation section. The image light projected toward the system is reflected by the rear projection optical system to the rear side of the display writing surface, and can be rear-projected on the display writing surface for display. The space on the back side of the electronic blackboard can be saved, and the electronic blackboard can be placed near a wall and used.

Here, at least the front side of the display writing surface is formed of a material that can be written with a water-based pen and erased by wiping with an eraser, or can be written on the front side of the writing surface with a water-based pen or eraser. It is preferable that a surface treatment that can be erased by is applied. For example, an acrylic resin, a polycarbonate resin or the like can be used as the material of the display writing surface, and a hard coat such as UV coating can be used as the surface treatment of the display writing surface. As a result, writing using a water-based pen or the like or erasing using an eraser can be performed on the display writing surface, and it can be used in the same manner as a conventional whiteboard.

The projector installation section is preferably arranged on the upper side or the lower side of the writing surface or on a predetermined section. Here, the predetermined portion is, for example, a side of the writing surface, and it is preferable to determine the position of the projector installation portion based on the positional relationship between the projector installed in the projector installation portion and the rear projection optical system. In particular, since the writing surface of the electronic blackboard is usually erected and held on the stand portion and arranged at a predetermined height from the floor surface, for example, the height of the eyes of the viewer, the lower side of the writing surface is an empty space. In many cases, it is preferable to install the projector installation section in an empty space on the lower side of this description surface. Thereby, space saving can be improved. Further, the projector installation section has a shape in which a general-purpose projector or the like can be installed and held,
It is preferable that the projector can be held at a predetermined angle toward the rear projection optical system. Thereby, the image light can be projected onto the rear projection optical system by the projector, reflected, and projected onto the display writing surface. The projector installed in the projector installation section is preferably connectable to a personal computer. This allows
Characters, drawings, etc. edited by a personal computer can be displayed on the display writing surface by a projector.

Further, it is preferable that the rear projection optical system has a reflection mirror which can be fixed at a predetermined angle with respect to the rear side of the writing surface. Thereby, the image light projected from the projector disposed on the upper side or the lower side of the writing surface can be reflected by the reflecting mirror and can be rear-projected on the back side of the display writing surface. When the rear projection optical system has a reflection mirror, it is preferable that the reflection mirror is arranged to face the projector installed in the projector installation section. As a result, the image light projected from the projector can be reflected by the reflection mirror and rear-projected on the back side of the display writing surface, and the image light from the projector can be reflected on the back side of the display writing surface via the reflection mirror. It is possible to improve the space saving on the back side of the electronic blackboard since it can be projected onto the screen.

According to a second aspect of the present invention, in the electronic blackboard according to the first aspect, the rear projection optical system includes a reflection mirror, and the reflection mirror is rotatably arranged, and the display is described. It has a structure in which it is covered so as to overlap with the back surface of the surface.

With this configuration, in addition to the function of claim 1,
It has the following actions. (1) Since the reflecting mirror is rotatably arranged and is covered so as to overlap the back surface of the display writing surface, the rear projection optical system can be folded to the display writing surface side, and the rear projection optical system is When not using, that is, when the image is not rear-projected on the display surface by the projector or when the electronic blackboard is not used, the rear projection optical system can be folded to the side of the description surface to improve the space saving of the storage place etc. You can

Here, the rear projection optical system is formed so as to be expandable and contractable toward the rear side of the display surface by forming the side surface of the casing into a bellows shape. It is preferable that the reflection mirror is rotatably disposed such that the lower end or the upper end is pivotally supported on the upper end or the lower end of the described surface or the stand. With this, when using the electronic blackboard, the reflection mirror can be fixed at a predetermined angle with respect to the back side of the display writing surface, and when the rear projection optical system is folded, the reflection mirror is overlaid on the display writing surface. Since the electronic blackboards can be brought close to each other so as to match, the electronic blackboard can be made thinner.

The invention according to claim 3 of the present invention is the electronic blackboard according to claim 1 or 2, wherein a pen-shaped dummy pen, an eraser-shaped dummy eraser, and a dummy pen and And a position detector that detects a two-dimensional position of the dummy eraser on the display surface of the dummy eraser.

With this configuration, in addition to the action of claim 1 or 2, the following action is obtained. (1) Handwritten input data can be created based on the position data of the dummy pen or dummy eraser detected by the position detection unit, and the handwritten input data can be rear-projected and displayed on the display surface by the projector. The characters and figures drawn on the writing surface can be displayed on the display writing surface as images, and the characters and figures on the display writing surface of the portion traced by the dummy eraser can be erased. (2) When the position data detected by the position detection unit is taken into a personal computer, handwriting input data is created based on the position data, and the handwriting input data is sent to another personal computer, printer, or the like via a network. Since it can be sent to the electronic blackboard etc. installed in the place, it is possible to display the same characters and figures at the same time on the electronic blackboard installed in a remote place, and it can be used in remote conferences, video conferences, etc. Can be improved.

Here, as the position detector, a dummy pen or a dummy eraser that emits signals such as ultrasonic waves or infrared rays is used, and a signal from the dummy pen or the dummy eraser is received to display the display surface of the dummy pen or the dummy eraser. A sensor that detects the above two-dimensional position, a pressure sensor that senses the pressure when a dummy pen or dummy eraser is brought into contact with the display surface and is pressed, and the like is used. When a position detection unit that receives signals from the dummy pen or the dummy eraser is provided, at least two position detection units are provided on the upper side of the display writing surface and the like, and the signals transmitted from the dummy pen and the dummy eraser are set to two. It is preferable to receive by one position detection part. Thereby, the two-dimensional position of the dummy pen or the dummy eraser can be detected, for example, from the difference between the propagation speeds of sound waves and infrared rays.

An embodiment of the present invention will be described below with reference to the drawings.

(Embodiment 1) FIG. 1A is a schematic front view of the electronic blackboard according to Embodiment 1 of the present invention.
(B) is a schematic side view of the electronic blackboard according to the first embodiment.

In the figure, 1 is the electronic blackboard in the first embodiment, 1a is a holding structure formed in a frame shape, 2 is held by the holding structure 1a, and the front side can be written with an aqueous pen or the like. And a display surface 2a capable of displaying characters and drawings on the front side, a stand portion 2a for holding and holding the holding structure 1a and the writing surface 2 is installed on a projector installation portion described later. The projector 4 is a pen-shaped dummy pen, 5 is an eraser-type dummy eraser, 6 is a foldable rear projection optical system disposed on the back side of the display writing surface 2, and 7 is a display. The projector installation portion 8a, 8b, which is disposed on the stand portion 2a below the writing surface 2 and on which the projector 3 is installed, is the holding structure 1a.
First and second position detectors arranged at both ends of the upper end of the
Is a reflection mirror which is arranged in the rear projection optical system 6 and can be fixed at a predetermined angle with respect to the rear side of the display writing surface 2, and 10 is a casing of the rear projection optical system 6.

Here, the display writing surface 2 is composed of a rear projection type screen for displaying characters, figures and the like by rear projection from the rear side. In addition, since the display surface 2 is formed of a material in consideration of the writability and erasability of a conventional water-based marker for whiteboard, or is surface-treated,
It can be used like a normal whiteboard.
Specifically, those made of acrylic resin, polycarbonate resin or the like, or those surface-treated by hard coating such as UV coating are used. Stand part 2
In a, the writing surface 2 is erected and held at a predetermined height from the floor surface. Further, wheels or the like may be provided at the contact portion of the stand portion 2a with the floor surface so that the electronic blackboard 1 can be easily moved. A general-purpose projector or the like is used as the projector 3. The projector 3 is installed in the projector installation section 7 and is connected to a personal computer (not shown). Dummy pen 4 and dummy eraser 5
Is formed so that it can be fixed to the front side of the holding structure 1a or the stand portion 2a by a magnet or the like, and when the dummy pen 4 and the dummy eraser 5 are not used, the front side of the holding structure 1a or the stand portion 2a. Etc. can be fastened. Further, the dummy pen 4 and the dummy eraser 5 have a signal transmitting section and can transmit a signal such as a sound wave or an infrared ray. The signals transmitted by the dummy pen 4 and the dummy eraser 5 are received by the first and second position detectors 8a and 8b. As a result, the first and second position detectors 8a,
8b can detect the two-dimensional positions of the dummy pen 4 and the dummy eraser 5. The rear projection optical system 6 is formed to be expandable and contractable with respect to the display writing surface 2 by forming the side of the casing 10 into a bellows shape. The projector installation unit 7 can hold the projector 3 tilted by a predetermined angle so that the image light projected from the projector 3 is reflected by the reflection mirror 9 and rear-projected on the display writing surface 2. In the first embodiment, the projector installation unit 7 is tiltably arranged by pivotally supporting the lower side of the projector installation unit 7, and the projector 3 is tilted at a predetermined angle when the electronic blackboard 1 is used. When the electronic blackboard 1 is not used, the projector 3 can be detached and the projector installation section 7 can be tilted to the stand section 2a side, so that the projector installation section 7 prevents the rear projection optical system 6 from being folded. In this case, the electronic blackboard 1 can be made thinner, and the space saving of the installation place or the storage place can be improved.
The reflection mirror 9 is disposed inside the casing 10 of the rear projection optical system 6, and when the electronic blackboard 1 is used, the image light projected from the projector 3 is rear-projected onto the display description surface 2 so that the display description surface 2 is displayed. The projector 2 is fixed at a predetermined angle with respect to the back side of the projector 2. Also, the reflection mirror 9
It is preferable that the upper end of the above is pivotally supported on the upper portion of the holding structure 1a, and the reflection mirror 9 is rotatably arranged. Thereby, when the rear projection optical system 6 is folded when the electronic blackboard 1 is not used, the rear projection optical system 6 can be brought close to the rear side of the display writing surface 2 so as to be superposed on the rear side of the display writing surface 2. An electronic blackboard 1 that does not hinder folding
Can be made thinner, and the space saving of the installation place or the storage place can be improved.

The operation of the electronic blackboard having the above-described structure according to the first embodiment will be described below.

The projector 3 projects image information such as characters and drawings from a personal computer as image light, and the projected image light is rear-projected on the display surface 2 by the reflection mirror 9 of the rear-projection optical system 6 and displayed. The image is displayed on the front side of the writing surface 2. Display with the dummy pen 4 Writing surface 2
If you draw letters or figures on the top, the movement of the dummy pen 4
It is possible to read as the two-dimensional position data by the second position detection units 8a and 8b, convert the read position data into characters and drawings, and display the data on the display writing surface 2. As a result, it is possible to perform handwriting input as if a character or a figure was written on the whiteboard surface with a water-based pen like a conventional electronic blackboard. When deleting the displayed characters or figures, the dummy eraser 5 can be used to trace the characters or figures displayed on the display surface 2 to detect the movement of the dummy eraser 5 in the first and second position detectors 8a. , B, it can be read as two-dimensional position data, the part to be erased can be determined from the read position data, and the characters and figures in that part can be erased. As a result, it is possible to erase characters and figures written with a water-based pen as if they were erased by wiping with an eraser as in the conventional electronic blackboard. Also,
In the electronic blackboard of the first embodiment, by connecting a personal computer (not shown) and the projector 3, it is possible to display characters and drawings edited by the personal computer on the display writing surface 2 by the projector 3, Furthermore, it is also possible to take in handwritten data such as minutes and the like into a personal computer and save it in the memory of the personal computer. In addition, by connecting a personal computer to the network, it is possible to simultaneously display similar characters and figures on the electronic blackboard 1 installed at a remote location.
Usability is improved in remote conferences and video conferences.

The electronic blackboard of the first embodiment can be folded and stored when not in use. The folding operation will be described below.

FIG. 2 is a schematic side view showing the folded state of the electronic blackboard according to the first embodiment of the present invention.

As shown in FIG. 2, when the electronic blackboard 1 is stored or when the projector 3 is not used, the projector 3 is detached from the projector installation section 7 and the projector installation section 7 is stored from the position where it is used. To position A
Tilt in the direction of. Further, the reflection mirror 9 provided in the rear projection optical system 6 is rotated in the direction B from the position in use to the position in storage. In this way, the projector installation unit 7 and the reflection mirror 9 are rotated to fold the rear projection optical system 6 to make the electronic blackboard 1 thin. As a result, it can be used and stored in a small installation space, and the space saving of the installation place and the storage place can be improved.

Since the electronic blackboard according to the first embodiment is configured as described above, the following effects can be obtained. (1) By installing the projector 3 such as a commercially available general-purpose projector in the projector installation section 7, the display writing surface 2
Rear projection display can be performed, and it is possible to prevent a shadow of a writer or an explainer from being generated on the projection screen, which cannot be avoided by the method of projecting an image from the front surface of the electronic blackboard 1. (2) The movements of the dummy pen 4 and the dummy eraser 5 are first,
Since it can be read as two-dimensional position data by the second position detectors 8a and 8b, and the read position data can be converted into characters, drawings, etc., and displayed on the display / writing surface 2, like a conventional electronic blackboard. In addition, it is possible to display or erase the handwritten input data on the display writing surface 2 by the projector 3 as if a character or a figure was written on the whiteboard surface with the water-based pen. (3) Since the display surface 2 is formed or surface-treated with a material that allows writing and erasing with a conventional whiteboard water-based marker, the writing and erasing should be performed in the same manner as a normal whiteboard. You can (4) Since the projector board 7 and the reflection mirror 9 are rotated to fold the rear projection optical system 6 to make the electronic blackboard 1 thin, it can be used and stored in a small installation space. It is possible to improve the space saving of the storage place. (5) Since the projector installation unit 7 is provided, by making the projector 3 removable from the projector installation unit 7, a general-purpose projector can be used and usability can be improved.

[0029]

As described above, according to the electronic blackboard of the present invention, the following advantageous effects can be obtained.

According to the invention described in claim 1, (1) since the projector installation section is provided, a commercially available general-purpose projector is installed in the projector installation section, and the image light from the projector is projected by the rear projection optical system. It is possible to provide an electronic blackboard which can be rear-projected and displayed on the display writing surface via. (2) Since the image from the projector installed in the projector installation section can be rear-projected and displayed on the display writing surface via the rear projection optical system, an instructor or a description can be displayed on the front side of the display writing surface of the electronic blackboard. (EN) An electronic blackboard capable of improving the visibility of an image displayed on a display writing surface, a written character, a drawing, etc. without the shadow of the person standing on the display writing surface. be able to. (3) Since the rear projection optical system is disposed on the back side of the display surface and the projector installation section is disposed above or below the display surface, the rear projection optical system is installed from the projector installed in the projector installation section. The image light projected toward the system is reflected by the rear projection optical system to the rear side of the display writing surface, and can be rear-projected on the display writing surface for display. It is possible to provide an electronic blackboard that can save space on the back side of the electronic blackboard and can be used by arranging the electronic blackboard near a wall or the like.

According to the invention described in claim 2, claim 1
In addition to the effects of (1), the rear projection optical system can be folded to the display writing surface side, so when the rear projection optical system is not used, that is, when the image is not rear-projected on the display writing surface by the projector or the electronic blackboard is used. If not, by folding the rear projection optical system to the side of the writing surface, it is possible to provide an electronic blackboard capable of improving space saving such as a storage place.

According to the invention of claim 3, claim 1
In addition to the effect of 2), (1) Handwritten input data is created based on the position data of the dummy pen or dummy eraser detected by the position detection unit, and the handwritten input data is rear-projected and displayed on the display writing surface by the projector. Since it is possible to display the characters and figures drawn on the display writing surface with a dummy pen as images, it is possible to erase the characters and drawings on the display writing surface of the part traced by the dummy eraser. An electronic blackboard that can be provided can be provided. (2) When the position data detected by the position detection unit is taken into a personal computer, handwriting input data is created based on the position data, and the handwriting input data is sent to another personal computer, printer, or the like via a network. Since it can be sent to the electronic blackboard etc. installed in the place, it is possible to display the same characters and figures at the same time on the electronic blackboard installed in a remote place, and it can be used in remote conferences, video conferences, etc. It is possible to provide an electronic blackboard that can improve the.

[Brief description of drawings]

FIG. 1A is a schematic front side configuration diagram of an electronic blackboard according to the first embodiment. FIG. 1B is a schematic side configuration diagram of an electronic blackboard according to the first embodiment.

FIG. 2 is a schematic side-side configuration diagram showing a folded state of the electronic blackboard according to the first embodiment.

[Explanation of symbols]

1 electronic blackboard 1a holding structure 2 Display surface 2a Stand section 3 projector 4 Dummy pen 5 Dummy eraser 6 Rear projection optical system 7 Projector installation section 8a First position detector 8b Second position detector 9 reflection mirror 10 casing

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Toshiyuki Ogawa             1006 Kadoma, Kadoma-shi, Osaka Matsushita Electric             Sangyo Co., Ltd. F-term (reference) 2C071 CA02 CA05 DA01                 2H021 AA00 BA21

Claims (3)

[Claims] 1. A stand portion, a display writing surface formed by a rear projection type screen that is uprightly held by the stand portion and displays characters, drawings and the like by rear projection, and the display writing by projecting image light. A rear projection type projector for displaying characters, drawings, etc. on a surface thereof is installed, and a projector installation portion is disposed above or below the display writing surface or in a predetermined portion, and is disposed on the back side of the display writing surface. An electronic blackboard, comprising: a rear projection optical system that is installed in a projector installation section and that reflects image light projected from the projector and rear-projects the image light onto the display surface. 2. The rear projection optical system includes a reflection mirror,
2. The electronic blackboard according to claim 1, wherein the reflection mirror is rotatably arranged and is covered so as to overlap the back surface of the display surface. 3. A dummy pen formed in a pen shape, a dummy eraser formed in an eraser shape, and a position detection unit for detecting a two-dimensional position of the dummy pen and the dummy eraser on the display writing surface. The electronic blackboard according to claim 1 or 2, further comprising: