JPH08108689A - Electronic blackboard - Google Patents

Abstract

PURPOSE: To provide an electronic blackboard simple in construction, light in weight and easily movable, which can read and copy an image written on a blackboard/whiteboard. CONSTITUTION: A camera supporting means 3 for setting an electronic camera 4 so as to be movable to a read position on the front side of a whiteboard 1 and to a non-read position above the whiteboard 1 is mounted to a frame 2 for supporting the whiteboard 1. By using the electronic camera 4 for reading an image, an electronic blackboard simple in construction, light in weight and easily movable can be made.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic blackboard for copying images such as figures and characters drawn on a black / white board.

[0002]

2. Description of the Related Art As a conventional electronic blackboard, first, a movably provided sheet material is moved, an image drawn on the sheet material is read by a scanner provided midway, and the read image is output by a printer. What you do is the second
It has been known that a scanner movably mounted along the plane of the whiteboard is moved to read the image drawn on the whiteboard, and the read image is output by a printer.

[0003]

However, the first conventional electronic blackboard requires a dedicated sheet material and a mechanism for moving the sheet material, which complicates the configuration, and therefore increases the weight and moves the sheet material. It was inconvenient for me. Also,
In the second conventional electronic blackboard, the scanner itself needs to be equipped with a motor or the like in order to allow the scanner to run by itself, and further, the rail for moving the scanner is provided along the width direction of the whiteboard, so that the structure becomes special. The weight of the entire device is also increased, which is inconvenient to move.

In view of the above problems, an object of the present invention is to provide a lightweight and easy-to-move electronic blackboard having a simple structure, and further, even if a commonly used known blackboard or white board is used, An object of the present invention is to provide an electronic blackboard capable of copying clear images similar to the electronic blackboard.

[0005]

SUMMARY OF THE INVENTION An electronic blackboard of the present invention is a black / white board capable of writing and erasing characters and the like supported on a frame and an electronic camera having an image pickup device for converting an optical image into an electric signal. / A frame movably mounted on a reading position on the front side of the white plate and a non-reading position above the black / white plate, or camera support means attached to the black / white plate, and an image read by this electronic camera is copied. It is preferable that the camera support means has the position of the electronic camera at the reading position in front of the upper center of the black / white plate, or in front of the center of the black / white plate. Further, it is desirable that the camera support means and the printer are detachable, and further, it is desirable that the camera support means and the printer have a storage means for storing the read image data of one screen.
Further, it is desirable to have a light projecting unit that illuminates the black / white plate, and further it is desirable to have a light amount correcting unit that uniformly corrects the light amount of the image data.

[0006]

Embodiments of the present invention will be described with reference to the drawings. FIG.
Is a front view of the electronic blackboard, FIG. 2 is a plan view of the electronic blackboard, and FIG. 3 is a side view of the electronic blackboard.

The whiteboard 1 is capable of drawing and erasing characters and images with a marker and an eraser, and is provided with a caster 201 on the lower side of a substantially H-shaped frame 2 which is rotatable about the central portions of both ends thereof. It is a well-known one that is movably supported, and its size is a general vertical 90
The size is 0 mm × width 1800 mm, and the outer height including the frame 2 is 1800 mm.

The camera support means 3 has a mounting portion 301 fixed to a vertical portion 202 on the right side of the frame 2 in FIG.
The camera support rod 302 is provided so as to rotate in the horizontal direction with respect to 1.
An electronic camera 4 for reading an image with an image pickup device such as a CCD sensor and converting it into an electric signal is provided at the front end of 02 so as to be movable up and down through a slide mechanism (not shown). When the electronic camera 4 is moved in the direction of the middle arrow A and the electronic camera 4 is moved in the downward direction (direction of the arrow B), the electronic camera 4 faces the whiteboard 1 in front of the upper center of the whiteboard 1. The position of the electronic camera 4 at this time is a position where the right and left ends of the whiteboard 1 can be read.

As shown in FIG. 1, the positions of the camera support rod 302 and the electronic camera 4 at this time are on the upper surface of the whiteboard 1. It is designed not to come into contact. Furthermore, in order to prevent the user from accidentally touching the camera support rod 302 or the electronic camera 4, the electronic camera 4 is moved upward (the direction opposite to the arrow B) and the camera support rod 302 is moved in the opposite direction of the arrow A. It suffices if the electronic camera 4 is rotated in the direction to be positioned on the upper surface of the whiteboard 1. Further, the position of the electronic camera 4 at this time does not hinder the rotation of the whiteboard 1.

The printer 5 is attached to the horizontal portion 203 of the frame 2 below the whiteboard 1 by a fastening tool (not shown), and has a copying function for copying on thermal paper, turning on the power, and setting the number of copies. It has an operation function of inputting the start of copying and changing the copy density.

FIG. 4 is a block diagram showing the electrical configuration of the electronic blackboard. The electronic camera 4 has a wide-angle lens 401 and a shutter 402 that allow the entire whiteboard 1 to be read even from a close position of about 1 m. , A rectangular CCD sensor 403 having an aspect ratio of 1: 2 which is the same as that of the whiteboard 1 so as not to read anything other than the whiteboard 1, and a strobe 404 which is a projecting means for illuminating the whiteboard 1.
And a control unit 405 that controls the entire electronic camera 4. If the electronic camera 4 is tilted so that the optical axis is directed toward the center of the whiteboard 1, the read image will be distorted, so the optical axis X will be above the whiteboard 1 so that it is perpendicular to the plane of the whiteboard 1. Towards
Whiteboard 1 using only the lower half of lens 401
Is read.

The printer 5 is an operation unit 5 for turning on the power, setting the number of copies, inputting the start of copying, and changing the copy density.
01, a control unit 502 that controls the printer 5, and a memory 5 that stores an image for one screen read by the electronic camera 4.
03, a printer driver 504, and a thermal head array 505 having the same number of heating elements as the number of pixels in the vertical direction of the CCD sensor 403, and further, the amount of light passing through the center of the lens and the lens which are conspicuously seen in a wide-angle lens. 506 that stores the light amount correction data that corrects the light amount unevenness that is the sum of the light amount unevenness due to the difference in the light amount that passes through the edge side of the light and the light amount unevenness on the whiteboard due to the strobe, and the read image data and the light amount. The calculation unit 507 is a light amount correction unit that calculates image data whose light amount is corrected from the correction data.

Next, the operation of the electronic blackboard of this embodiment will be described. The user moves the camera support rod 302 in the direction of arrow A, moves the electronic camera 4 in the direction of arrow B, points the electronic camera 4 toward the whiteboard 1, and copies the image of the whiteboard 1 from the operation unit 501 of the printer 5. When a start instruction is given, first, the strobe 404 emits light, the shutter 402 is opened in synchronization with this, and the whiteboard 1 is read by the CCD sensor 403 and read 1.
The image data for the screen is transferred to the printer 5 and is transferred to the memory 50.
3 is stored. Next, this image data and the memory 506
Based on the light amount correction data stored in
The image data in which the unevenness of the light amount is corrected is calculated in 7, and the calculated image data after correction is transferred to the thermal head array 505 through the printer driver 504, and an image is formed on the thermal paper 6.

In this embodiment, a rectangular CCD sensor 403 corresponding to the whiteboard 1 and the CCD sensor 4 are provided.
The storage means 503 for storing the image data for one screen read in 03 is further provided, and by irradiating the whiteboard 1 with the strobe 404, the image can be read in a short time with a sufficient light amount, and in a further short time. By reading the image, it is possible to obtain clear image data without blur even if there is some vibration. Further, since the mounting portion 301 of the camera support means 3 and the printer 5 are mounted on the frame 2 by respective fasteners (not shown), loosen them to remove them from the frame 2 and carry them to another whiteboard or blackboard. , Can be attached to another whiteboard or blackboard.

As the light amount correction data of this embodiment, the data obtained in advance from the characteristics of the lens and strobe is RO.
It may be stored in M, or in consideration of the lighting condition of the place where the blackboard or whiteboard to be attached is installed, the blackboard or whiteboard is read first, and this is read from the actual light amount unevenness of the read image data. It is also possible to newly calculate uniform light amount correction data and store it.

5 to 8 show a second embodiment of the present invention. FIG. 5 is a front view of the electronic blackboard, FIG. 6 is a side view of the electronic blackboard, and FIG. 7 is an electrical configuration of the electronic blackboard. FIG. 8 is a block diagram showing the state when the CCD sensor is reading.

The camera support means 7 in this embodiment is shown in FIG.
In the left and right vertical portions 202 of the frame 2, a pair of mounting portions 701 fixed by fasteners (not shown), and a substantially U-shaped configuration provided so as to vertically rotate by shafts 702 of the pair of mounting portions 701. When the electronic camera 8 moves the camera support rod 703 in the direction of arrow B in FIGS. 5 and 6 until it is stopped by the stopper 704, the electronic camera 8 moves to the center of the camera support rod 703. As shown in FIG. 7, the optical axis Y is installed in front of the center of the whiteboard 1 so that the optical axis Y faces the center of the whiteboard 1. When the camera support rod 703 is moved in the direction opposite to the arrow B, the whiteboard 1 is moved. It is located on the upper surface of No. 1 so that the user does not touch it.

Further, from the block diagram of FIG. 7, the electronic camera 8 of this embodiment has a wide-angle lens 801 capable of reading the entire whiteboard 1 even from a close position, and the whiteboard 1 along the shaft 802. A line-shaped CCD sensor 803 corresponding to the vertical direction of the whiteboard 1 that moves parallel to the plane, a control unit 804 that controls the electronic camera 8, a memory 805 that stores image data read by the CCD sensor 803, The printer 9 includes a strobe 806 that is a light projecting unit that illuminates the whiteboard 1 and a light amount correction filter 807 that corrects the uneven light amount of the lens and the uneven light amount of the strobe together. Operation unit 9 for setting the number of copies, setting the copy range, inputting the start of copying, and changing the copy density
01, a control unit 902 for controlling the printer 9, a memory 903, a printer driver 904, and a thermal head array 905 having the same number of heating elements as the number of pixels of the CCD sensor 803.

Next, the operation of the electronic blackboard in the second embodiment will be described. The user moves the camera support rod 703 to the arrow B.
When the electronic camera 8 is moved toward the whiteboard 1 and an instruction to start copying the image of the whiteboard 1 is given from the operation unit 901 of the printer 9, as shown in FIG.
The CD sensor 803 moves along the shaft 802 in the direction of the arrow D, and the strobe 806 emits light a plurality of times in synchronization with the movement of the CCD sensor 803.
The unevenness of the light amount is corrected by 7 and the image is read. The read image data is temporarily stored in the memory 805, and once the image data for one screen is stored, the control unit 9
The image data in the memory 805 is read by the command 03 and transferred to the thermal head array 905 via the printer driver 904, and an image is formed on the thermal paper 6.

In the second embodiment, the whiteboard 1
Copy with the same aspect ratio of 1: 2 as that of
It is possible to change the copy range whether to copy with the plate size. Therefore, as shown in FIG. 8, when copying the entire whiteboard 1, move the CCD sensor 803 between E and F in the figure. When the entire whiteboard 1 is read and the copy is made in the A size, the CCD sensor 803 is moved from G to H so that only the central portion of the whiteboard 1 corresponding to the A size is read.

In the second embodiment, the strobe 806 emits light in synchronization with the reading of an image so that a sufficient amount of light for reading can be obtained. Therefore, even if the reading speed of the CCD sensor 803 is increased. A clear image is obtained, and the reading speed is increased to prevent image blur caused by vibration. Furthermore, the electronic camera 8
Since the lens 801 can be used in a wide range as a whole, unlike the first embodiment, by making the position of the camera face the central portion of the whiteboard 1, the position of the electronic camera 8 should be closer to the whiteboard 1. Can also be read, and therefore the camera support rod can be shortened to further reduce the size and weight of the electronic blackboard. Furthermore, since it is possible to read without using the end portion of the lens 801, the unevenness in the amount of transmitted light is reduced, and the degree of light amount correction is suppressed. You can

In the second embodiment, the light amount correction filter for making the light amount of the image data uniform and reading is provided on the lens side, but such a light amount correction filter may be provided on the strobe side. Good.

In the first embodiment, the mounting portion 301 of the camera support means 3 for supporting the electronic camera 4 is mounted on the right vertical portion 202 of the frame 2 of the whiteboard 1, but the left vertical portion 202. In this case, the mounting angle of the electronic camera 4 with respect to the camera support rod 302 may be changed so that the optical axis of the electronic camera 4 faces the whiteboard 1. Although the whiteboard 1 rotatable with respect to the frame 2 is used in both embodiments, the invention is not limited to this, and a blackboard may be used, or a fixed one may be used with respect to the frame. The mounting portion of the camera support means when a black / white plate that is fixed to the frame is used may be directly attached to the edge portion of the whiteboard 1.

[0024]

According to the electronic blackboard of the present invention, an electronic camera is used for reading an image, and the electronic camera is positioned on the front side of the black / white plate when reading the image and above the black / white plate when not reading. Therefore, compared to the conventional electronic blackboard, it has a simple structure and is lightweight and easy to move, and the user does not accidentally touch the electronic camera when not reading. Furthermore, the position of the electronic camera at the time of reading can be set to the front above the center of the black / white plate so that it does not hinder the user even when not reading, or the position of the electronic camera at the time of reading is black. / By setting the front of the center of the white plate, the position can be optically optimal. Further, the camera supporting means and the printer can be attached to and detached from the black / white plate so that the camera can be used by being attached to the existing black / white plate. Further, by providing a storage means for storing image data for one screen,
The image can be read in a short time and the image can be read with less blur. Further, by providing the light projecting means, it is possible to obtain a sufficient amount of light and read an image in a shorter time, and as a result, it is possible to make a clearer copy without image blur. Further, by providing the light amount correction means, the entire black / white plate can be read with a uniform light amount, and an image with a uniform density can be obtained.

[Brief description of drawings]

[Figure 1] Front view of an electronic blackboard

[Figure 2] Plan view of the electronic blackboard

[Figure 3] Side view of the electronic blackboard

FIG. 4 is a block diagram showing an electrical configuration of the electronic blackboard.

FIG. 5 is a front view of an electronic blackboard according to another embodiment.

FIG. 6 is a side view of an electronic blackboard according to another embodiment.

FIG. 7 is a block diagram showing an electrical configuration of an electronic blackboard according to another embodiment.

FIG. 8 is a diagram showing a state when the CCD sensor is being read.

[Explanation of symbols]

 1 Whiteboard 2 Frame 3 Camera Support Means 301 Mounting Part 302 Camera Support Rod 4 Electronic Camera 401 Lens 403 CCD Sensor 404 Strobe (Light Emitting Means) 5 Printer 507 Computing Means (Light Amount Correcting Means) 6 Thermal Paper 7 Camera Support Means 701 Mounting 703 Camera support rod 8 Electronic camera 801 Lens 803 CCD sensor 806 Strobe (light emitting means) 807 Light intensity correction filter 9 Printer

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Ryuji Mizuuchi 1-11-2 Kyobashi, Chuo-ku, Tokyo Inside Japan Typewriter Co., Ltd.

Claims (7)

[Claims] 1. An electronic camera equipped with a black / white plate capable of writing and erasing characters and the like supported on a frame and an image pickup device for converting an optical image into an electric signal is used as a reading position on the front side of the black / white plate and a black / white plate. An electronic blackboard having a frame movably mounted on a non-reading position above a white board or a camera support means attached to a black / white board, and a printer for copying an image read by the electronic camera. 2. The electronic blackboard according to claim 1, wherein the position of the electronic camera at the reading position is in front of the upper center of the black / white plate. 3. The electronic blackboard according to claim 1, wherein the position of the electronic camera at the reading position is in front of the center of the black / white plate. 4. An electronic blackboard wherein the camera support means and the printer according to claim 1 are detachable. 5. The electronic blackboard according to claim 1, further comprising image storage means for storing image data for one screen read. 6. The electronic blackboard according to claim 1, wherein the electronic blackboard has a light projecting means for illuminating a black / white plate. 7. The electronic blackboard according to claim 1, wherein the electronic blackboard has a light amount correction means for uniformly correcting the light amount of image data.