JP2517788Y2 - Electronic blackboard device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an electronic blackboard device for directly copying characters, figures, symbols and the like drawn on a writing surface.

[Prior Art and its Problems] When such an electronic blackboard device is used in a meeting or the like, the attendees of the meeting do not need to copy the writing information drawn on the writing surface of the electronic blackboard device, and the discussion of the theme of the meeting is considered. This electronic blackboard device is used in various fields because it can be immersed in.

This electronic blackboard device copies and prints the entire writing surface, but sometimes it is particularly desirable to copy and print only a part of the writing surface. Even in such a case, the entire writing surface is copied and printed. It was impossible to extend and print.

[Object of the Invention] The present invention has been made in view of the above-described circumstances, and an object thereof is to provide an electronic blackboard device capable of taking out and enlarging only a part of a writing surface and printing it out. is there.

[Summary of the Invention] In order to achieve the above-mentioned object, the present invention is a reading unit for reading writing information drawn on a writing surface via an optical system having a predetermined optical magnification, and a writing unit read by the reading unit. In an electronic blackboard device having a printing means for printing out information on a printing paper smaller than the writing surface, a partial designating means for designating a part of the writing surface, and an optical path of an optical system and a centerline of a reading means at a substantially center line of the portion. A moving means for moving the optical system and the reading means to a position where the two coincide with each other;
Position discriminating means for discriminating the position of the portion designated by the portion designating means, and an optical system and a reading means for the writing surface so that only the designated portion is projected on the reading means according to the discrimination result of the position discriminating means. And a printing unit that prints out the writing information projected by the optical system and read by the reading unit over almost the entire printing paper.

[Embodiment] An embodiment of the present invention will be described below in detail with reference to the drawings.

[Structure of Embodiment] In this embodiment, the reading means is the light source 7 and the image sensor 10.
The writing surface is the writing sheet 3, the partial designating means is the designating sheet 11, the moving means is the step motor 17, the spacing changing means is the step motor 16, and the position determining means is the data processing unit 21.
And the control unit 6, the control means includes the control unit 6 and the position control circuit 23.
The printing means correspond to the printer 22, respectively.

In this embodiment, the writing information is read by an image sensor, converted into an electric signal, and the read data is printed by a printer.

FIG. 1 shows the overall structure of the electronic blackboard device, with rollers 1, 2 at the upper and lower edges inside the blackboard surface of the electronic blackboard device.
An endless writing sheet 3 is wound around the rollers 1 and 2 and wound around the rollers 1 and 2. The writing sheet 3 is made of a white flexible synthetic resin, and has characters,
Writing information such as figures and symbols is drawn.
During the reading operation of the writing information, the sheet feeding step motor 4 is driven, and the rotational force of the step motor 4 is transmitted to the roller 1 and fed to the writing sheet 3. The step motor 4 is rotationally driven by the control unit 6 based on the operation of the whole copy key or the partial copy key (neither is shown) of the key input unit 5.

A light source 7 extending in the horizontal direction is provided on the back side of the writing sheet 3, and the light emitted from the light source 7 is projected onto the writing sheet 3 on which the sent writing information is drawn, and the writing is performed. The reflected light of the image of the information is reflected by the mirror 8 and is imaged on the image sensor 10 by the lens 9 and is projected on the image sensor 10. Image sensor 10 is CCD
(Charge coupled device), the writing information is read line by line in dot units.

FIG. 2 shows the designated sheet 11, and the writing sheet 3
When partially enlarging and copying a part of this writing sheet 3 with the size of A1 (JIS standard size), write a transparent designated sheet 11 of A3 size supported by a rectangular frame. Set to the place where you want to make the partial enlarged copy of 3. A bar code 12 is printed on the upper left end of the frame portion of the designated sheet 11, and as shown in FIG. 2, the point 2 cm below the left end of the bar code 12 is the start position of the part to be enlarged and copied. Become.

FIG. 3 shows a mounting structure of the lens 9 and the image sensor 10. Racks 13 and 13 are provided on both edges of the writing sheet 3 on the back side, and the racks 13 and 13 have two supporting frames. 14 and 14 are slidably bridged, and pinions 15 and 15 are axially supported at both ends of the support frame 14 to support the rack.
13 and 13 are engaged. One pinion of each support frame 14
15 is rotated by a moving step motor 16 so that each support frame 14 can move on the racks 13, 13.
The lens 9 and the image sensor 10 are slidably supported on the support frames 14 along the support frames 14,
Moving step motors 17, 17 are fixed to the side portions of the lens 9 and the image sensor 10, and the rotational force of the moving step motors 17, 17 is transmitted to the pinions 18, 18, respectively.
The pinions 18 and 18 mesh with racks 19 and 19 formed on the support frames 14 and 14, respectively, and a step motor 17 for movement,
When the lens 17 and the image sensor 10 are driven by 17, the supporting frame 1
It is possible to move on 4 and 14.

The width of the writing sheet 3 is k, the width of the image sensor 10 is 1,
Assuming that the distance from the lens 9 to the writing sheet 3 through the mirror 8 is a and the distance from the lens 9 to the image sensor 10 is b, a: b = k: l at the time of front copying, which means that partial enlargement copying is performed. At this time, the width of A3 is half the width of A1, so the support frames 14 and 14 move up and down so that a: b = k / 2: l. The lens 9 and the image sensor 10 at the vertical centerline position of
The image sensor 10 and the left and right move. The movement step motors 16, 16 and the movement step motors 17, 17 are driven by the position control circuit 23 under the control of the control unit 6, respectively.

The writing information read by the image sensor 10 is analog data of a level proportional to the amount of reflected light, and the reading writing information is sliced at a constant slice level by the binarization circuit 20 to be "1" (black portion). Alternatively, it is binarized to either “0” (white portion) and is printed out from the printer 22 through the data processing unit 21. This printer
The printing paper 24 of 22 is printed over the whole. The image sensor 10, the binarization circuit 20, the data processing unit 21, and the printer 22 are driven and controlled by the control unit 6 while being synchronized with each other.

[Operation of Embodiment] Next, the operation of this embodiment will be described.

Now, assume that the designation sheet 11 is set on the writing sheet 3 and the partial copy key of the key input unit 5 is operated. Then, an ON signal of this key is given to the control unit 6, and the control unit 6 causes the light source 7 to operate. Is turned on and the stepping motor 4 for sheet feeding is driven to read the writing information of the writing sheet 3, and printing is performed until the writing information of the bar code 12 is obtained from the writing information given from the data processing unit 21. The stepping motor 4 is driven to sequentially feed the writing sheet 3. At this time, the printer 22 is not driven at all. When the writing information of the barcode 12 is obtained, the writing sheet 3 for 2 cm is further fed from the line of the lower edge of the barcode 12. Next, the control unit 6 controls the position control circuit 23 to change the distance b between the lens 9 and the image sensor 10 from a × l / k to 2a.
X stepping motors 16 and 16 for movement so that they are twice as large as l / k
And the lens 9 and the image sensor 10 are driven by the moving step motors 17 so that the lens 9 and the image sensor 10 are displaced laterally by k / 4 from the head position of the barcode 12. As a result, only the writing information in the designated sheet 11 is enlarged and projected and imaged on the image sensor 10.

Then, the control unit 6 again drives the sheet feeding step motor 4 to read the writing information of the writing sheet 3. This time, the printer 22 is driven. Then, the designated sheet
Only the writing information in 11 is binarized from the image sensor 10.
20. The data is printed out from the printer 22 via the data processing unit 21.

In this way, only a part of the writing surface can be enlarged and printed out.

In this case, the vertical length of the specified sheet 11 of A3 size is
Since the vertical length of the writing sheet 3 of A1 size is ½, the rotation angle of each line when the sheet feeding step motor 4 is rotationally driven for reading is also ½. Since the length of the reading line is reduced to half, the brightness of the image of the writing information formed on the image sensor 10 is also reduced to half, and the exposure time of the image sensor 10 must be doubled. The rotation speed is half that of front copy.

In addition to the transparent designation sheet 11, the portion designation means for designating a part of the writing surface has a thin red frame shape,
The image sensor 10 and a red image sensor that detects only another red color may be provided side by side, and when red writing information of a certain length is obtained from this red image sensor, partial enlargement copying may be performed. The designation method and the position determination method may be in any form and are not limited to the above-described embodiment, and the same applies to other means and names.

[Effect of Device] As described in detail above, this device determines the position of a specified portion of the writing surface, reads the writing information of the specified portion, and prints it out. Only a part can be taken out and enlarged and printed out, and only the important points can be selected and given to the person listening to the explanation, which is very effective.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention. FIG. 1 is an overall schematic configuration diagram of an electronic blackboard device, FIG. 2 is a plan view of a designated sheet 11, and FIG. 3 is a mounting structure of a lens 9 and an image sensor 10. FIG. 3 ... Writing sheet, 6 ... Control part, 7 ... Light source, 9 ...
Lens, 10 …… Image sensor, 11 …… Designated sheet, 12
…… Bar code, 14 …… Support frame, 16,17 …… Movement step motor, 21 …… Data processing unit, 22 …… Printer, 23
...... Position control circuit.

Claims (1)

(57) [Scope of utility model registration request] 1. A reading means for reading writing information drawn on a writing surface via an optical system having a predetermined optical magnification, and the writing information read by the reading means is printed out on a printing paper smaller than the writing surface. In an electronic blackboard device having a printing means, a part designating means for designating a part of the writing surface, and the optical system and the optical system to the position where the optical path of the optical system and the centerline of the reading means coincide with the substantial centerline of the part. Moving means for moving the reading means, interval changing means for changing the mutual distance between the writing surface, the optical system, and the reading means, and position determining means for determining the position of the portion designated by the portion designating means, Control for changing the positional relationship between the optical system and the reading unit with respect to the writing surface so that only the designated portion is projected on the reading unit according to the determination result of the position determining unit. Stage and an electronic blackboard apparatus; and a printing means for printing out throughout substantially the entire printing paper writing information read by the projected further said reading means by said optical system.