JPH063745A - Projected image recorder - Google Patents

Abstract

(57) [Summary] [Purpose] To realize a projection image recording device capable of copying synthetic data in which an enlarged and projected image is added or modified by handwriting with a simple system configuration to achieve cost reduction. [Structure] A transparent board 3 for writing handwritten character graphics and the like is arranged on the front surface of a screen 2 on which image data projected by an image projection apparatus is displayed so as to be overlapped with a predetermined space, and The image sensor 7 for reading an image is sandwiched between the screen and the screen, and the image sensor 7 reads an optical composite image obtained by optically combining the projected image and the character graphic on the transparent boat.

Description

Detailed Description of the Invention

[0001]

The present invention relates to an image projected on a screen by an image projection device such as an overhead projector (hereinafter referred to as OHP) or a liquid crystal projector, and printed out by a printer.
The present invention relates to a projection image recording apparatus having a copy function capable of recording on an electronic file recording medium such as a magnetic disk or an optical disk, and particularly to an image projected on a screen and written so as to be directly superimposed on the projected enlarged image. The present invention relates to a projection image recording apparatus capable of synthesizing and recording handwritten characters and drawing data such as figures.

[0002]

2. Description of the Related Art When a meeting, a study, a meeting, a presentation, etc. are held based on materials prepared in advance, the materials are enlarged and projected on a screen by an OHP or a liquid crystal projector, and explained to a large number of participants. The number of cases to do is increasing recently. However, in this case, since a dedicated screen is often used, it is not possible to directly add or change the contents on the dedicated screen (because the dedicated screen becomes difficult to remove) and therefore the explanation person Participants cannot directly add or change by handwriting on the enlarged and projected image.

If an erasable whiteboard is used as the screen, or if a erasable transparent board is arranged in front of a dedicated screen, it is possible to write or change by handwriting directly on the enlarged projected image. It becomes possible to add, and line drawing is easier and more reliable than in the case of writing on the original on the OHP side, and it becomes possible to consider and explain in the vicinity of the enlarged and projected image. However, when a material created in advance is projected on a screen or a whiteboard with a projection device such as an OHP in this way, the material (original) for projection can be copied by copying, but by handwriting on the enlarged projected image. Since the combined data with additions and modifications cannot be copied, it was inefficient in creating minutes and handouts.

On the other hand, a product called an electronic blackboard has become widespread in recent years, and it is possible to read the handwritten matter on the board with an image sensor and print it out. However, since the image sensor of this electronic blackboard is configured to be able to read only the handwritten data drawn on the board, for example, the material previously created by a projection device such as an OHP is enlarged and projected onto the board of the electronic blackboard. Even in this case, however, the enlarged projected image and the handwritten data cannot be combined and copied, which is also inefficient in creating the minutes and handouts.

In order to solve such a problem, an electronic board system having a special electromagnetic position detecting function (digitizer function) has been developed and commercialized. This electronic board system holds the data to be displayed on the board by a projection device in the form of electronic data by reading it with an image sensor, etc., and at the same time, stores the data handwritten on the electronic board with an electronic pen. , It can be captured as digital coordinate data and can be displayed by combining the material data and handwritten data that are created and held in advance on the electronic board, or the material data and the handwritten data that are created and held in advance can be combined. It can be printed out or saved as electronic data.

[0006]

However, the electronic board system described above has an expensive construction in which the entire board has a position detecting function, and a special writing pen is required. Furthermore, in order to convert the data input from the board (call data by icon, handwritten input data, etc.) into the image of the projection device, a computer for image synthesis processing (synthesis processing of electronic data) is required, and In order to print out the display image on the board, a dedicated printer that receives data from a computer having an image combining processing function is required. Therefore, the scale of the system as a whole expands to become a considerably expensive system, and maintenance for system maintenance is also required. Furthermore, since a popular personal computer is used as the computer, there is also a problem that the resolution of the recording output is low (70 dpi (Do for the A4 paper size conversion).
t Per Inch; a unit of resolution). If the resolution of the image displayed on the board is increased in order to improve the quality of recording output, there are many problems such as higher introduction cost, and it is not generally popular.

The present invention has been made in view of the above points,
The purpose is to realize a projection image recording device capable of copying synthetic data in which added and modified by handwriting is applied to an enlarged projected image with a simple system configuration to reduce the cost and There is no need for maintenance.

[0008]

In order to achieve the above object, a projection image recording apparatus according to the present invention writes a handwritten character or the like on the front surface of a screen on which image data projected by the image projection apparatus is displayed. The transparent boards are arranged so as to overlap with each other with a predetermined space therebetween, and the image sensor for reading the image is sandwiched between the board and the screen to optically project the projected image and the character graphic on the transparent boat. Then, the optical composite image is read by an image sensor.

[0009]

Since the projected image and the character graphic on the transparent boat are optically combined, and this optical combined image is read by the image sensor, a device and an image projection device in which a conventional electronic blackboard is slightly added The system can be constructed by and, the system can be simplified, the cost can be reduced, and the maintenance can be facilitated. Moreover, the resolution of the output recording is determined only by the image sensor, so even if it is a general type, it will be converted to A4 size paper and
About 00 dpi can be easily obtained.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to one embodiment shown in FIGS. Although this embodiment shows an example in which an OHP is used as the image projection apparatus, it is possible to use another image projection apparatus such as a liquid crystal projector other than the OHP as the image projection apparatus. Shows a case where a composite image is recorded by print output.
The present invention is also applicable to the case where a composite image is recorded on a recording medium for electronic files such as a magnetic disk or an optical disk.

FIG. 1 is an explanatory view showing an outline of a projection image recording apparatus according to this embodiment, FIG. 2 is an explanatory view showing an operation principle of the projection image recording apparatus according to this embodiment, and FIG. 3 is a projection in this embodiment. FIG. 4 is an explanatory diagram showing the principle of optical synthesis of an image from the device and a handwritten character graphic, and FIG. 4 is a simplified block diagram showing a control system of the projection image recording device according to the present embodiment.

1 to 3, 1a and 1b are support structures for supporting a screen and a transparent board, 2 is an opaque (generally white) screen for forming a projected image,
3 is a transparent board for writing handwritten characters and figures, 4 is ink for handwritten characters and figures, 5 is OHP for projecting documents used in meetings, 6 is document to be projected, and 7 is projected image. An image sensor for converting into an electric signal, 8 is a scanner means for laterally scanning the image sensor 7, and 9
Is a thermal paper for recording an image on the screen, 10 is a printer (thermal printer) for outputting an electric signal sent from the image sensor 7 to the thermal paper 9, 11 is an electric signal from the image sensor 7 to the printer 10. A connecting cable 12 for sending is a transparent protective cover for protecting the image sensor 7 from dust and the like.

The transparent board 3 is arranged on the front side (projection side) of the screen 2 so as to overlap the screen 2 at a predetermined interval, and in the space between the transparent board 3 and the screen 2. A vertically long image sensor 7 conveyed in the horizontal direction by the scanner means 8 is located.
The image sensor 7 has unit areas (dot areas) of an image sensor such as a CCD (charge coupled device) arranged so as to have a required resolution in only one column in the vertical direction (or in a zigzag arrangement in the vertical direction in some cases). It has been set up,
The front side is covered with the transparent protective cover 12 described above. Further, the scanner means 8 is configured to be laterally conveyed at a predetermined speed by a sensor feed motor and an appropriate transmission mechanism.

In the above structure, as shown in FIG. 1, the image of the document 6 projected from the OHP 5 is the transparent board 3.
Through the screen, and an image is formed on the screen 2 and displayed as an enlarged image. If you look at this from the projection side, a normal OHP
Similar to, the document appears to be magnified and projected on the screen 2. On the other hand, a few c apart from this screen 2
Since the transparent board 3 is arranged on the projection side with a space of m, for example, if corrections and changes are written by hand on the transparent board 3 with a pen during a meeting, the data written by handwriting (characters and figures by ink 4) Etc.) and the image projected on the screen 2 appear to overlap when viewed from the projection side.
In other words, the enlarged image projected on the screen 2 is visually recognized as if it was added or modified by handwriting.

Next, a case will be described in which the result of directly handwriting addition or correction on the enlarged image projected on the screen 2 as described above is recorded (printed out) on paper. When the user inputs printing instructions,
The scanner means 8 in FIG. 2 starts scanning slowly from the left side in the direction of the arrow. At this time, as shown in FIG. 3, the projected light is transmitted through the transparent board 3 as it is in the portion on the transparent board 3 where the ink 4 is absent (the portion where handwritten characters and figures are not present) and is incident on the image sensor 7. The projection light is blocked at the portion where the ink 4 is present and is not incident on the image sensor 7. Therefore, in the portion without ink 4, the projected image is directly input to the image sensor 7, and the ink 4
A black shadow is formed on a certain portion, and this is read by the image sensor 7 as handwritten data. That is, as a result, what is optically combined with the projected image data and the handwritten data is input to the image sensor 7. Then, the printer 10 receiving the output from the image sensor 7 prints out the result of synthesizing the image projected on the screen 2 and the handwritten data on the thermal paper 9.

Here, the electrical processing will be described with reference to FIG. 4, but since this part may be exactly the same as a commercially available electronic blackboard, it will be briefly described. In FIG. 4, 20 is an image sensor scanner device, and 21 is a control circuit for controlling the printer 10 and the image sensor scanner device 20. Now, the signal converted into an electric signal by the image sensor 7 is converted into a digital signal by an analog-digital converter (A / D converter) 22, and then the connection cable 11
Is sent to the printer 10 via the. The output data from the image sensor scanner device 20 is output to the printer 10
Among them, it is temporarily stored in the memory 23, read by the output control section 24 based on a command from the control circuit 21, and output to the thermal head 25. That is, the control circuit 21 controls the paper feed motor 26 of the printer 10 and the sensor feed motor 27 of the image sensor scanner device 20 to synchronize the reading speed of the image sensor 7 with the paper feed speed, and the thermal head 25. By outputting a signal to, the optically combined image data is recorded on the thermal paper 9.

According to this embodiment having such a configuration, the image sensor 7 for reading an image is sandwiched between the transparent board 3 and the screen 2, and the projected image and the character graphic on the transparent boat 3 are formed. Since the image sensor 7 reads the optical composite image after optically combining the images, the system can be constructed by the conventional electronic blackboard with some additions and the image projection device. As a result, the cost can be reduced and maintenance is easy. Moreover, since the resolution of the recording to be output is determined only by the image sensor 7, it is possible to easily obtain about 200 dpi even if a general type is converted into A4 size paper.

Although a thermal printer is used as the printer in the above-mentioned embodiments, it goes without saying that various other printers can be adopted. Also, the output of the image sensor 7 is A / D converted,
It is also apparent to those skilled in the art that the data can be transferred to an electronic data recording medium such as a magnetic disk such as a floppy disk or a hard disk, a magneto-optical disk, an optical disk, an IC memory or the like so as to be recordable.

[0019]

As described above, according to the present invention, an image from an image projection device and a handwritten character can be obtained by combining an image projection device with a device that is simple enough to change a part of a conventional electronic blackboard. The image data in which the figure is combined can be easily recorded / saved in a recording medium such as paper, which is highly convenient. Moreover, since the device size on the board side is about the same as that of a conventional electronic blackboard, it is easy to move and it is completely independent of the image projection device.
An image projection device such as HP can be used as it is. further,
Since a computer for image data composition processing and a dedicated printer connected to this computer are not required, the configuration of the entire system can be simplified, the introduction cost of the system can be greatly reduced, and the maintenance is easy. Furthermore, since the resolution is determined by the vertical resolution of the image sensor, increasing the resolution does not significantly increase the cost.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing an outline of a projection image recording apparatus according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing an operation principle of the projection image recording apparatus according to the embodiment of the present invention.

FIG. 3 is an explanatory diagram showing a principle of optical composition of an image from a projection device and a handwritten character graphic in the projection image recording device according to the embodiment of the present invention.

FIG. 4 is a simplified block diagram showing a control system of a projection image recording apparatus according to an embodiment of the present invention.

[Explanation of symbols]

 1a, 1b Support structure 2 Screen 3 Transparent board 4 Ink 5 OHP (overhead projector) 6 Projected document 7 Image sensor 8 Scanner means 9 Thermal paper 10 Printer 11 Connection cable 12 Transparent protective cover

Claims (4)

[Claims] 1. An image projection device capable of synthesizing and recording image data projected on a screen and drawing image data such as a character graphic written on a board arranged so as to overlap the screen. A projection image recording device characterized by the above. 2. The board according to claim 1, wherein the board is arranged with a predetermined gap on the projection side of the screen on which the image projected by the image projection device is formed, and the board is made of a transparent material. The projection image recording apparatus is characterized in that an optical sensor is provided between the screen and the board, and image data optically combined by the optical sensor is read. 3. The projection image recording apparatus according to claim 2, wherein the optical sensor performs a scanning operation in a predetermined direction. 4. The projection image recording device according to claim 2, further comprising a printer or an electronic file recording medium for recording the output of the optical sensor.