JPH0420799B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field) The present invention relates to an electronic blackboard device that can print texts and figures on a blackboard used for meetings, meetings, etc.

(Prior art) In conventional meetings, briefing sessions, meetings, etc., the contents of the meeting are written on a blackboard, and all participants transcribe information such as matters decided as the progress is made, figures, etc. in notebooks. Or, because he copied the notes of one transcriber, he had the following shortcomings.

(1) All or several transcribers are unable to concentrate in a meeting or meeting.

(2) It takes time to proceed with the meeting to match the writing speed of the transcriber.

(3) Transcriber's errors occur and communication is insufficient.

(4) There is proofreading by the transcriber, and copies are not readily available.

In order to solve these problems, the applicant has developed an electronic whiteboard device previously filed in Japanese Patent Application No. 44283/1983.

This electronic blackboard device includes a writing medium having an elongated writing surface that can be written on with a writing instrument, a predetermined amount of the writing medium being fed out in the longitudinal direction, and a part of the writing surface on which the writing can be written written on in the longitudinal direction. A feeding section provided as a surface, a light source that illuminates the writing medium, a lens that collects reflected light from the writing medium, a sensor that converts the reflected light collected by the lens into an electrical signal, and an output of the sensor. a reading section including a circuit section that converts a signal into a digital electric signal; and a printing section that prints and records on a recording medium according to the electric signal output from the reading section, and a writing screen of the writing medium. is conveyed to the reading position of the reading section, provides another writing surface of the writing medium as a new writing screen, and at the same time prints and records on the recording medium according to the electric signal output from the reading section. be.

Therefore, according to this electronic whiteboard device, a copy of written content can be easily and immediately obtained, and the meeting can proceed smoothly.

On the other hand, in this electronic blackboard device, the writing surface reading section is composed of a light source, a condensing lens, a sensor, and a circuit section, and the image of the writing surface is reduced and formed on the sensor by the condensing lens. Therefore, in order to fit the entire width of the writing surface into the field of view of the sensor using the condensing lens, a certain optical path length is required between the writing surface, the condensing lens, and the sensor, which increases the size of the electronic whiteboard device. do.

(Object of the Invention) An object of the present invention is to reduce the size of the electronic whiteboard device by improving the reading section.

(Structure of the Invention) The present invention includes a writing medium on which characters, figures, etc. can be written with a writing instrument, and a writing medium moving device that moves the writing medium in its longitudinal direction and supplies any part of it as a writing screen. , a reading unit that reads written images such as characters and figures written on the writing medium by irradiating light onto the writing medium and converting the reflected light into an electrical signal; and an electrical signal output from the reading unit. Accordingly, in an electronic whiteboard device having a printing unit that prints the writing image on a recording medium, the writing medium moving device includes two rollers that support the writing medium, and a drive unit that moves the writing medium by driving the rollers. The reading unit is provided with a motor that moves the writing medium, and a support member that supports the motor and the roller, and the reading unit is fixed to the support member, and a light source that irradiates the writing medium with light, and a light source that irradiates the writing medium with light. an image sensor that is provided across the entire width of the writing medium in a direction perpendicular to the writing medium and converts reflected light from the writing medium into an electrical signal; and an image sensor that is provided between the image sensor and the writing medium and that is provided over the entire width of the writing medium. and a rod lens that forms an image of reflected light from the image sensor on the image sensor in a form close to parallel light, and the writing image is read in the same size while the writing medium is moved.

(Example) Examples of the present invention will be described in detail below.

First, FIG. 1 is a plan view of an electronic whiteboard device according to an embodiment of the present invention. In the figure, reference numeral 1 denotes a sheet as a writing medium on which characters, figures, etc. can be written using a writing instrument. 2 and 3 are rollers that support the sheet 1 and are driven by a motor 14 to move the sheet 1. Reference numeral 4 denotes an operation section from which instructions for moving the sheet 1 are given. 5 is a cover that covers a power source, a control unit, and a printing device, which will be described later. 6 is the printing paper discharged from the printing device, and the printing paper receiving part 3
0 sequentially. Reference numeral 7 denotes a reading section, the details of which will be described later. 19-1, 19-2 are rollers 2, 3,
This is a support member that supports the motor 14. 21-
a, 22-a, 21-b, and 22-b are bearings for the rollers 2 and 3, respectively.

Next, FIG. 2 is a diagram with the cover 5 and support members 19-1 and 19-2 of FIG. 1 removed in order to explain parts that cannot be shown in FIG. are separated. In the figure, 2-1 and 3-1 are the axes of rollers 2 and 3, respectively. A cable 8 electrically connects the reading section 7 and the control section 10. 9 is a power supply section of the electronic whiteboard device. Reference numeral 10 denotes a control unit that controls the electronic whiteboard device, and the details will be described later. The control section 10 receives power from the power supply section 9 via the cable 33. Reference numeral 11 denotes a motor drive unit that drives the motor 14 , and is connected to the control unit 10 via a cable 31 and to the motor 14 via a cable 34 . 12 is a printing device, which is connected to the control unit 10 via a cable 32. 13 is a printing device 12
A roll of printing paper loaded into a Reference numeral 16 denotes a gearbox, in which the rotation of the motor 14 is decelerated to a predetermined speed. Reference numeral 18 denotes a plate that presses the sheet 1 from the back side to facilitate writing.

Next, FIG. 3 shows the rollers 2, 3 and the motor 14.
It is a diagram explaining how to attach rollers 2 and 3.
and the motor 14 is the support member 19-1, 19-2
and supported by support members 19-1 and 19-2.
is fixed to the wall 20.

Next, FIG. 4 is a sectional view taken along line XX in FIG.
The details of the reading section 7 are shown. The reading section 7 has a support member 19-1 at both ends with metal fittings 29,
It is fixed at 19-2. This support member 19-
1 and 19-2 are fixed to the wall 20 as described above. The reading section 7 is equipped with a rod lens 23 at a position facing the sheet 1.
3 is arranged in close contact with the sheet 1. Also,
This rod lens 23 is supported by a metal fitting 23-1. A line image sensor 24 is attached at a position facing the rod lens 23. This image sensor 24 is attached to a printed circuit board 35, and a metal fitting 23-1 for attaching the rod lens 23 is also attached to this printed circuit board 35. 7-1 is a washer, and the printed circuit board 35 is screwed to the washer 7-1. 3
6 is a socket for connecting the cable 8 to the printed circuit board 35. Note that the plate 18 is fixed to the wall 20.

Next, FIG. 5 is a sectional view taken along line AA in FIG.
The details of the reading section 7 are shown. As can be seen from this figure, the reading section 7 is equipped with a light source 25. 26 is a socket for fixing the light source 25, 27
is a light shielding plate, and 28 is a light beam.

Here, as is clear from FIGS. 4 and 5, the light source 25, rod lens 23, and image sensor 24 are arranged in a direction perpendicular to the longitudinal direction of the sheet 1, that is, the moving direction, and the length thereof extends over the entire width of sheet 1. rod lens 23
is provided between the image sensor 24 and the sheet 1, and images the light reflected from the sheet 1 by the light source 25 onto the image sensor 24 in a form close to parallel light rays. Therefore, the image sensor 24
Read the above handwritten image at the same size.

Next, the operation will be explained using FIG. 6. When it is desired to print characters, figures, and symbols written on the sheet 1, the operator instructs the control unit 53 from the operation unit 4 to that effect. The control unit 53 gives instructions to the motor drive unit 11 to drive the motor 14. As a result, the sheet 1 starts moving at a constant speed (toward the left in FIG. 1). At the same time, the control section 53 controls the printed circuit board 3.
A signal is transmitted to the circuit section 55 and the encoding/decoding circuit section 56 of No. 5, and the circuit section 55 and the encoding/decoding circuit section 56 become operational. Light from the light source 25 is irradiated onto the sheet 1, and the reflected light is input to the rod lens 23. When the sheet 1 moves and the written characters, figures, and symbols move directly below the rod lens 23, the optical images of these letters, figures, and symbols are transmitted through the rod lens 23 to the image sensor 24.
imaged on top. The image sensor 24 converts this image into an electrical signal and sends it to the circuit section 55. The circuit unit 55 assembles a screen signal using a periodic signal in the horizontal direction that matches the moving speed of the sheet 1, and sends this to the encoding/decoding circuit unit 56. The encoding/decoding circuit section 56 converts the analog signal from the circuit section 55 into a digital signal and sends it to the print control section 57 . The print control section 57 drives the print head 52,
Printing is performed on the printing paper 13. As a result, the characters, figures, and symbols written on sheet 1 are transferred to printing paper 13.
printed on. Here, the printing paper 13 is sheet 1
It is sent out at a constant speed that is synchronized with the moving speed of and takes into account the reduction ratio. 6 is printed printing paper. 51 is a roller, and the printing paper 13 is sandwiched between the printing head 52 and this roller 51.

Note that by providing a storage device 58, the output signal from the encoding/decoding circuit section 56 can be stored and used repeatedly. Further, by providing a modem 59 and a line control device 60, it is also possible to communicate with the outside.

FIG. 7 shows a second embodiment of the present invention, in which the feeding direction of the sheet 1 is changed from the one shown in FIG. 1, from left and right to up and down. The rest is the same as the first embodiment.

(Effects of the Invention) Since the present invention can print characters, figures, and symbols written on a blackboard, it has the following advantages.

(1) Immediacy.

(2) Mistakes caused by transcription can be prevented.

(3) Can communicate with the outside world.

(4) It is possible to memorize and read out written images.

Therefore, it can be expected to streamline meetings and meetings and save labor.

Further, in the present invention, since the sheet is movable and the reading section is fixed, a new writing screen can be provided while reading the already written screen. Therefore, there is an effect that the next writing can be performed without erasing the written screen.

Furthermore, in the present invention, the reading section has a rod lens between the sheet and the image sensor, and since the image is read in the same size, there is no need to worry about chromatic aberration or image distortion of the lens. The distance can be set short. For this reason, there is an effect that the sheet reading unit and, by extension, the electronic whiteboard device can be made smaller.

[Brief explanation of drawings]

FIG. 1 is a plan view of an electronic whiteboard device according to an embodiment of the present invention, FIG. 2 is a detailed view of each part of FIG. 1, FIG. 3 is a diagram explaining how to attach the roller and motor, and FIG. 1, FIG. 5 is a sectional view taken along line A-A in FIG. 4, FIG. 6 is a circuit diagram of the electronic blackboard device of the present invention, and FIG. FIG. 1... Sheet, 2, 3... Roller, 2-1, 3-1
...Axis, 4...Operation unit, 5...Cover, 6...Printing paper,
7...Reading section, 7-1...Washer, 8, 31, 32,
33... Cable, 9... Power supply unit, 10... Control unit, 1
DESCRIPTION OF SYMBOLS 1...Motor drive unit, 12...Printing device, 13...Printing paper, 14...Motor, 16...Gearbox, 18
...Plate, 19-1, 19-2...Support member, 20...
Wall, 21-a, 21-b, 22-a, 22-b...
Bearing, 23... Rod lens, 23-1... Metal fitting, 2
4... Image sensor, 25... Light source, 26... Socket, 27... Light shielding plate, 28... Light beam, 29... Metal fitting, 3
0...Print paper receiver, 35...Printed circuit board, 36...
Socket, 51...Roller, 52...Printing head, 5
3...Control unit, 55...Circuit unit, 56...Encoding/decoding circuit unit, 57...Printing control unit.

Claims (1)

[Scope of Claims] 1. A writing medium on which characters, figures, etc. can be written with a writing implement, a writing medium moving device that moves the writing medium in its longitudinal direction and supplies any part of it as a writing screen; A reading unit that reads written images such as characters and figures written on the writing medium by irradiating light onto the writing medium and converting the reflected light into an electrical signal; In the electronic whiteboard device, the writing medium moving device includes two rollers that support the writing medium, and drives the rollers to move the writing medium. The reading unit includes a motor, and a support member that supports the motor and the roller, and the reading unit is fixed to the support member, and includes a light source that irradiates the writing medium with light, and an image sensor provided across the entire width of the writing medium in a perpendicular direction and converting reflected light from the writing medium into an electrical signal; and an image sensor provided between the image sensor and the writing medium from the writing medium. and a rod lens that images the reflected light of the image on the image sensor in a form close to parallel light beams, and reads the written image in equal size while moving the writing medium.