JPH11245588A - Electronic blackboard device - Google Patents

Abstract

(57) [Problem] To provide an electronic blackboard device having a color printing function and capable of reducing the running cost of printing. A monochrome thermal printhead (15) for printing on the surface of a thermal roll paper (13) and a color inkjet printhead (16) for printing on the back of the thermal roll paper (13). Printing is performed by the head 15, and in the case of a color printing instruction, color printing is performed by the color inkjet print head 16. Therefore, color copying can be performed, and high-speed monochrome copying can be performed at low running cost.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic blackboard device capable of reading information written on a board and printing it on a recording sheet.

[0002]

2. Description of the Related Art Conventionally, an electronic blackboard device described in Japanese Patent Publication No. 62-56000 has been widely used in a conference room of a company or the like. When such an electronic blackboard device is used, the content recorded on the board at a meeting or the like can be printed as it is on plain paper or thermal paper, and there is no need to transfer it to a notebook or the like. The board of the electronic blackboard device
Since writing and erasing can be performed with a water-based marker, the recorded content on the board can be erased with an eraser after use, and the same screen can be used as a new writing surface. Further, it is possible to read not only information written by a marker but also a chart or the like attached to a board.

[0003]

However, in the above-described conventional electronic blackboard device, reading and printing are only performed in monochrome, so that information written with a marker other than black, such as red or blue, is also printed in black. There was a problem that. Further, even if a chart using a plurality of colors is read, only monochrome printing can be performed, and support for color printing has been strongly desired.

Therefore, it is conceivable to implement a color electronic blackboard device that can read color components on a board using a color image sensor such as a color CCD and print it on recording paper with a color printer such as an ink jet printer. However, when reading / printing only in monochrome using such a color electronic blackboard device, there is a problem that a running cost is high and a recording speed is slow in a color printer. In other words, in the case of a printer that performs color printing with only three colors of CMY, C
Since the three colors of MY must be used, the running cost becomes extremely high and the recording speed becomes slow. Further, in the case of a printer that performs color printing with four colors of CMYK, the consumption of only black becomes intense, and at the same time, the recording speed decreases.

Accordingly, the present invention provides a color printing function,
It is an object of the present invention to provide an electronic blackboard device capable of reducing printing running costs.

[0006]

According to the present invention, there is provided an electronic blackboard device comprising: a writing sheet which can be written and erased by a writing instrument;
A reading unit that reads information written on a writing sheet for each color component, a color printer that outputs information read by the reading unit in a predetermined color to recording paper, and black information that is read by the reading unit. A thermal printer for outputting to thermal recording paper.

With this configuration, a color printing function is provided,
An electronic blackboard device capable of reducing printing running costs can be realized.

[0008]

An electronic blackboard device according to the first aspect of the present invention includes a writing sheet that can be written and erased with a writing instrument,
A reading unit that reads information written on a writing sheet for each color component, a color printer that outputs information read by the reading unit in a predetermined color to recording paper, and black information that is read by the reading unit. A thermal printer for outputting to thermal recording paper.

According to a second aspect of the present invention, there is provided an electronic blackboard device, wherein a color print head of the color printer and a thermal print head of the thermal printer are arranged vertically with a recording paper interposed therebetween.

According to each of the inventions having the above-described configurations, color copying can be performed in the electronic blackboard device, and high-speed monochrome copying can be performed at low running cost.

An embodiment of the present invention will be described below with reference to the drawings. 1 is a perspective view of an electronic blackboard device according to an embodiment of the present invention, FIG. 2 is a cross-sectional view of the electronic blackboard device, FIG. 3 is a configuration diagram of a printer unit in the electronic blackboard device, and FIG. 5 is an operation flowchart of the electronic blackboard device.

In FIG. 1, reference numeral 1 denotes a case of a blackboard main body, 2 denotes a writing sheet which is stretched over an opening provided in the case 1 and on which information can be written / erased by an aqueous marker, and 3 denotes a case. 1, a printer unit having an inkjet color printer (to be described later), a thermal monochrome printer (to be described later), a control unit, etc., 4 is an operation panel provided in the printer unit 3, and 5 is an upper part of the printer unit 3. Is a tray for a marker, an eraser, or the like provided on the printer, 6 is a thermosensitive recording paper printed by the printer unit 3, and 7 is a stand of a housing.

FIG. 2 is a cross-sectional view showing the internal structure of the housing 1, and 8 and 9 are driven by a motor (not shown).
A sheet roller for moving the writing sheet 2, a light source 10 for irradiating the writing sheet 2 with light, and a light source 11 for the light source 1
A reflection mirror for reflecting light reflected from the writing sheet 2 of light emitted from 0. A reflection mirror 12 receives light from the reflection mirror 11 and outputs electrical signals of three primary colors of R (red), G (green), and B (blue). This is a color CCD image sensor that converts the image into a color CCD image.

The information written on the writing surface of the writing sheet 2 is
As the writing sheet 2 is conveyed by the sheet rollers 8 and 9, the writing sheet 2 is read by the light source 10, the reflection mirror 11, and the color CCD image sensor 12. The read information is converted into a signal of three primary colors of RGB and output.

FIG. 3 is a structural view showing the internal structure of the printer unit 3. Numeral 13 denotes a thermal roll paper set so that the back surface (the surface without the thermal material) faces upward. A thermal paper transport roller 14 is driven by a motor (not shown) and transports the thermal roll paper 13. A monochrome thermal print head 15 for performing monochrome printing is located on the front side of the thermal roll paper 13. It is in close contact with the thermal roll paper 13 by the paper transport roller 14. Reference numeral 16 denotes a color inkjet print head for performing color printing, which is positioned above the thermal roll paper 13 and performs color printing on the back surface of the thermal roll paper 13. Reference numeral 17 denotes a thermal paper guide that is located below the color inkjet print head 16 with the thermal roll paper 13 interposed therebetween and that holds the thermal roll paper 13 horizontally.

In the case of performing color printing, the thermal roll paper 13 is transported by the thermal paper transport roller 14 while the thermal roll paper 13 is transported by the color inkjet print head 16.
Color printing on the back side of. When performing monochrome printing, monochrome printing is performed on the surface of the thermal roll paper 13 by the monochrome thermal print head 15 while transporting the thermal roll paper 13 by the thermal paper transport roller 14.

In FIG. 4, reference numeral 12 denotes the color CC described above.
A D image sensor 18, an A / D converter for performing analog / digital conversion of an analog electric signal output from the color CCD image sensor 12 into an 8-bit digital signal;
19 is RGB based on the output from the A / D converter 18
A shading correction circuit 20 that uniformly corrects and outputs the color signal of each pixel, and outputs a signal of three primary colors RGB output from the shading correction circuit 19 as C (cyan), M (magenta), Y (yellow), and K (black). A) a color print signal or a monochrome binary print signal of black only; 21 is a color inkjet printer control circuit for causing the color inkjet print head 16 to perform printing based on the color print signal from the conversion circuit 20; It is. Reference numeral 22 denotes a monochrome thermal printer control circuit that causes the monochrome thermal print head 15 to perform printing based on the monochrome binary print signal from the conversion circuit 20. 23
Is a CPU (Central Processing Unit), which switches between a print signal of the conversion circuit 20 as a color print signal and a monochrome binary print signal, switches between color print and monochrome print, and controls the entire apparatus. Reference numeral 4 denotes the above-mentioned operation panel, which can be used by switching between color copying and monochrome copying by a switch (not shown).

The operation of the electronic blackboard device configured as described above will be described below with reference to the flowchart of FIG. When detecting that the color copy switch of the operation panel 4 is pressed in S1, the light source 10 is turned on in S2, and the sheet roller 8 and the sheet roller 9 are rotated in S3 to write the writing sheet 2 on which the information is written.
Start the transfer. Thereafter, in S4, the conversion circuit 20
Is switched to the color print signal conversion, the color ink jet printer control circuit is permitted to be operable in S5, and the thermal paper transport roller 14 is activated in S6 to start transporting the thermal roll paper 13.

As described above, the reflected light of the light illuminated on the surface of the writing sheet 2 by the light source 10 is incident on the color CCD image sensor 12 via the reflection mirror 11 and is reflected on the RGB 3.
The signals are separated into color signals of primary colors, converted into multivalued digital data for each color by an A / D converter 18, and a shading correction circuit 19 corrects a light amount variation of the light source 10 and a light receiving sensitivity variation of the color CCD image sensor 12. Is converted into a color print signal by the conversion circuit 20, and ink is applied from the color inkjet print head 16 to the back surface of the thermal roll paper 13 via the color inkjet printer control circuit 21 to form a color print image.

Thereafter, when the transfer of one screen of the writing sheet 2 is completed in S7, the operation of the color ink jet printer control circuit 21 is prohibited in S8, the transfer of the sheet roller 8 and the sheet roller 9 is stopped in S9, and in S10. Stops transport of thermal roll paper 13, S
In step 11, the light source 10 is turned off, and the color copy of the writing sheet 2 is completed.

When it is detected in step S12 that the monochrome copy switch of the operation panel 4 has been pressed, the process proceeds to step S1.
In step 3, the light source 10 is turned on, and in step S14, the sheet rollers 8 and 9 are rotated to start the transfer of the writing sheet 2 on which information is written. Thereafter, the conversion circuit 20 is switched to monochrome binary print signal conversion in S15, the monochrome thermal printer control circuit 22 is enabled to operate in S16, and the thermal paper transport roller 14 is activated in S17 to transport the thermal roll paper 13. Start.

As described above, the reflected light of the light illuminated on the surface of the writing sheet 2 by the light source 10 is incident on the color CCD image sensor 12 via the reflection mirror 11 and is reflected on the RGB 3.
The signals are separated into color signals of primary colors, converted into multivalued digital data for each color by an A / D converter 18, and a shading correction circuit 19 corrects a light amount variation of the light source 10 and a light receiving sensitivity variation of the color CCD image sensor 12. The heat is transmitted from the monochrome thermal print head 15 to the surface of the thermal roll paper 13 via the monochrome thermal printer control circuit 21 to produce a monochrome print image.

Thereafter, in S18, one of the writing sheets 2
When the transfer for the screen is completed, the operation of the monochrome thermal printer control circuit 22 is prohibited in S19, and the transfer of the sheet rollers 8 and 9 is stopped in S20.
In S21, the transport of the thermal roll paper 13 is stopped, and in S22
Then, the light source 10 is turned off, and the monochrome copy of the writing sheet 2 is completed.

As described above, color copying can be performed in the electronic blackboard apparatus, and in the case of monochrome copying, by using a thermal printer, low running costs can be realized without consuming ink.
In general, by performing monochrome printing using a thermal method that is faster than a color inkjet method, it is possible to provide an electronic blackboard device that can perform monochrome copying at high speed. In this embodiment, a color ink jet system is used to perform color printing, but a color thermal transfer system may be used.

[0025]

As described above, according to the present invention, color copying can be performed in the electronic blackboard device, and high-speed monochrome copying can be performed at low running cost.

[Brief description of the drawings]

FIG. 1 is a perspective view of an electronic blackboard device according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of the electronic blackboard device according to one embodiment of the present invention.

FIG. 3 is a configuration diagram of a printer unit in the electronic blackboard device according to the embodiment of the present invention.

FIG. 4 is a block diagram of an electronic blackboard device according to an embodiment of the present invention.

FIG. 5 is an operation flowchart of the electronic blackboard device according to the embodiment of the present invention;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Housing 2 Writing sheet 3 Printer part 4 Operation panel 5 Receiving tray 6 Thermal recording paper 7 Stand 8,9 Sheet roller 10 Light source 11 Reflection mirror 12 Color CCD image sensor 13 Thermal roll paper 15 Monochrome thermal print head 16 Color inkjet print head

Claims (2)

[Claims] 1. A writing sheet which can be written and erased by a writing instrument, a reading section for reading information written on the writing sheet for each color component, and information read by the reading section recorded in a predetermined color. An electronic blackboard device comprising: a color printer that outputs on paper; and a thermal printer that outputs information read by a reading unit in black on thermal recording paper. 2. An electronic blackboard apparatus according to claim 1, wherein a color print head of said color printer and a thermal print head of said thermal printer are arranged vertically above and below a recording paper.