JP2689934B2 - Electronic board - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic board capable of inputting coordinates by tracing on a tablet with a marker and displaying data by projecting data from a projection unit onto the tablet.

[0002]

2. Description of the Related Art Electronic boards have a surface (tablet).
Data such as characters entered using a marker on the tablet is generated and input by detecting the trajectory of the marker on the tablet, and these data are displayed on the tablet. It is a device.
FIG. 3 is a configuration diagram showing a schematic configuration of a conventional electronic board. In the figure, reference numeral 1 is a reflective tablet which is an input section and also a display section, and 2 is a marker for inputting data such that characters are written using the tablet 1 similarly to a blackboard or a white board.

Further, 3 is a coordinate detecting section for detecting the coordinates of the marker 2 on the tablet 1, and 4 is a trajectory of the marker 2 drawn by a change in the coordinates of the marker 2 on the tablet 1 detected by the coordinate detecting section 3. The drawing processing unit 5, 5 is an image memory in which the image information drawn by the drawing processing unit 4 is stored, and 6 is a projection unit which projects the image stored in the image memory 5 onto the tablet 1.

In this electronic board, the tablet 1
The data such as the image drawn by the marker 2 on the upper side indicates the change in the coordinates of the marker 2 detected by the coordinate detecting unit 3 and the drawing processing unit 4
Is stored in the image memory 5 as the locus of the marker 2, and this is projected onto the tablet 1 by the projection unit 6. That is, the image data drawn by the marker 2 is input by the tablet 1 and displayed on the tablet 1. Here, in the above description, the projection unit 6 projects the image on the input surface of the reflective tablet 1, but a transmissive tablet is used, and an image is projected from the back surface of the tablet by a projection means such as a projector. In some cases.

[0005]

Conventionally, the above-mentioned configuration has the following problems.
When an image is projected from the front of a reflective tablet by a projection unit such as a projector, the operator is located between the tablet and the projection unit when performing operations such as drawing on the tablet. There was a drawback that the shadow of was formed on the tablet and it was difficult to operate. Furthermore, since the tablet and projection unit cannot be integrated, the position of the tablet and projection unit must be adjusted each time it is used, or the tablet and projection unit must be fixed and installed in a conference room or other location where they will be used. It was necessary and troublesome.

On the other hand, when an image is projected from the back surface of a transmissive tablet by a projection unit such as a projector, the operator's shadow may be formed on the tablet because the image is projected from the back surface of the tablet. Without
Since the tablet and the projection unit can be integrated, no position adjustment is required. However, due to the structure of projecting an image from the back surface of the tablet, the depth of the device forming the electronic board becomes long, resulting in a large installation area, which is difficult to use in a small conference room or the like.

The present invention has been made to solve the above problems, and when an electronic board is used, adjustment at the time of installation is not required, and the installation place is not selected, so that the operator's The purpose is to prevent shadows from appearing too much.

[0008]

The electronic board of the present invention can be used to input coordinates by tracing on a tablet with a marker, and to display and output on the tablet by projecting from a projection unit. Means for supporting the projection part on the upper part of the tablet in a movable state so that the projection part projects from the tablet upper front part, a detection means for detecting the support position of the projection part in the support means, and a projection part obtained from the detection means. Image transformation means for transforming the image projected by the projection unit by using the position information. Further, the image transformation means is characterized in that the image projected on the tablet farther from the projection unit is transformed so as to be reduced.

[0009]

The position of the projection unit with respect to the tablet is standardized, and the image to be projected is transformed and displayed on the tablet according to the positional relationship of the projection unit with respect to the tablet.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a configuration diagram showing a configuration of an electronic board which is an embodiment of the present invention. In the figure, 7 is a support part that is arranged on the tablet 1 and supports the projection part 6 in a state of being movable in the horizontal direction of the tablet 1, and 8 is a position detection part that detects the support position of the projection part 6 on the support part 7. , 9 are image transformation units that transform the image data stored in the image memory 5 according to the position of the projection unit 6 detected by the position detection unit 1, 1
Reference numeral 0 denotes a modified image memory that stores the image data modified by the image modification unit 9. In the case of this configuration, the projection unit 6 projects the image data stored in the modified image memory 10 onto the tablet 1. Other reference numerals are the same as those in FIG.

Next, the signal flow will be described. When an operation such as drawing is performed on the surface of the tablet 1 using the marker 2, the tablet 1 outputs a tablet signal that changes depending on the position of the marker 2. This tablet signal is input to the coordinate detection unit 3, whereby the coordinate detection unit 3 calculates the coordinates of the marker 2 on the tablet 1 and outputs the coordinate information signal. This coordinate information signal is input to the drawing processing unit 4, and the drawing processing unit 4 uses the input coordinate information signal.
Then, the drawing information signal is generated and the marker 2 is displayed on the image memory 5.
Is stored as drawing information.

On the other hand, the supporting section 7 outputs a supporting section signal corresponding to the position where the projecting section 6 is supported. This supporting portion signal is input to the position detecting portion 8. Based on the input supporting portion signal, the position detecting portion 8 calculates the supporting position of the projection portion 6 in the supporting portion 7, and outputs the position information signal. This position information signal is input to the image transforming unit 9, and the image transforming unit 9 uses the input position information signal.
Then, the image deformation ratio is determined, the image information signal read from the image memory 5 is transformed to generate transformed image information, and the trajectory of the transformed marker 2 is stored in the transformed image memory 10 as the transformed drawing information.

The projection unit 6 projects and outputs the trajectory of the transformed marker 2 based on the transformation drawing information stored in the transformation image memory 10 as described above, and displays the trajectory of the marker 2 on the tablet 1. The trajectory of the marker 2 is accurately displayed on the tablet 1 regardless of the position of the projection unit 6 by the transformation of the image information signal of the image transformation unit 9. That is, if a square shape is input on the central portion of the tablet 1 with the marker 2, the square is displayed in the central portion of the tablet 1 regardless of whether the projection portion 6 is at the left end or the right end of the support portion 7.

FIG. 2 is a plan view for explaining the image deformation by the image deforming unit 9 described above, showing the state of the tablet 1, the projection unit 6, the supporting unit 7, and the input image and the projection image. As described above, if the rectangular shape as shown in FIG. 2A is input (drawn) on the tablet 1 with the marker 2, the rectangular shape is displayed in the image transformation unit 9 via the image memory 5 (FIG. 1). Image is input.

Here, as shown in FIG. 2B, when the projection unit 6 is located at the center of the support unit 7, a position information signal indicating this is received from the support unit 7 to generate an image. The rectangular shape in the memory 5 (FIG. 1) is shown in FIG.
As shown by the solid line, the shape is transformed into a symmetrical isosceles trapezoidal shape in which the lower side is shorter than the upper side. In the state shown in FIG. 2B, the lower the tablet 1 is projected, the further the figure projected by the projection unit 6 is, and the larger the projection magnification becomes. Therefore, FIG.
As shown in (c), if it is deformed so that it becomes smaller as it goes downward, the state projected and displayed on the tablet 1 becomes
It has the same shape as the original input.

In contrast to the above, when the projection unit 6 is arranged on the right side of the support unit 7 as shown in FIG. 2D, the image transformation unit 9 (FIG. 1) has a rectangular shape. As shown by the solid line in FIG. 2 (e), the shape is asymmetrical. When the projection unit 6 is arranged on the right side of the support unit 7, the lower left part of the tablet 1 is farther from the projection unit 6,
The projection magnification is also large. Therefore, FIG.
As shown in FIG. 7, if the shape is changed so that it becomes smaller toward the lower right direction, the state projected and displayed on the tablet 1 becomes equal to the shape of the original input.

The image transformation as described above can be realized by, for example, coordinate transformation using a determinant,
It is also possible to correct optical projection distortion and the like of the projection unit 6 itself by making various modifications to the determinant used. Further, the image information of the data obtained by another information processing apparatus is stored in the drawing processing unit 4 with reference to the coordinate information signal output from the coordinate detecting unit 3 (FIG. 1),
It goes without saying that the data displayed on the display unit such as the CRT of the information processing device may be displayed on the tablet 1. In this way, the electronic board described above can also be used as a man-machine interface of an information processing apparatus in which the marker 2 is used as a pointing device, character input means, or the like.

[0018]

As described above, according to the present invention, the projection unit is movably supported on the upper portion of the tablet so that the projection unit projects from the upper front portion of the tablet, and the projection position is set to the projection position. The image projected by the department was transformed. Therefore, even if the position of the projection unit is changed flexibly depending on the dominant arm of the operator and the position where the operator stands.
In accordance with that, display output can be done on the tablet, so
There is an effect that it is difficult to form a shadow on the tablet that hinders operations such as inputting with a marker. In addition, since the positions of the tablet and the projection unit are standardized, there is no need to adjust the positional relationship at the stage of use, there is no need to take a large installation area, and there is an effect that the installation location is not selected.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing a configuration of an electronic board that is an embodiment of the present invention.

FIG. 2 is a plan view for explaining image deformation by the image deformation unit 9 of FIG.

FIG. 3 is a configuration diagram showing a schematic configuration of a conventional electronic board.

[Explanation of symbols]

1 ... tablet, 2 ... marker, 3 ... coordinate detection unit, 4 ... drawing processing unit, 5 ... image memory, 6 ... projection unit, 7 ... support unit,
8 ... Position detecting unit, 9 ... Image deforming unit, 10 ... Deformed image memory.

Claims (3)

(57) [Claims] 1. An electronic board for inputting coordinates by tracing on a tablet with a marker, and displaying and outputting on the tablet by projecting from a projection unit, wherein the projection unit projects from the upper front part of the tablet. Support means for supporting the projection part in a movable state on the tablet upper part, detection means for detecting a support position of the projection part in the support means, and position information of the projection part obtained from the detection means. And an image transforming unit that transforms an image projected by the projection unit by using the electronic board. 2. The electronic board according to claim 1, wherein the image transforming unit transforms the image projected on the tablet farther from the projection unit so as to be reduced. 3. The electronic board according to claim 1, wherein the image transforming unit transforms the image projected by the projection unit so as to eliminate the distortion of the optical system of the projection unit. And an electronic board.