JPH1195676A - Image displaying system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To project and display an image having no distortion in its shape by transforming the image shown by the image signals, which are supplied to a video projector, in accordance with the rotational operation of the projector and supplying the transformed picture to the projector. SOLUTION: A controller 1 executes the image transformation process, which is conducted to an original image, when a video projector is rotated by an angle θ in a horizontal direction. A controller 5 receives the data indicating the value of the angle θtransmitted from the controller 1 through a serial port 3, operates a motor control board 6 in accordance with the data, controls the rotational operation of the motor of an electrically driven rotating table 7, and transmits the message indicating the completion of the operation to the controller 1 when the rotational operation is completed. The controller 1 outputs the image signals to a display section 4 corresponding to the transformed image formed by the image transforming process. The video projector of the section 4 projects and displays the transformed image on a screen in accordance with the supplied image signals.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image display system having a function of projecting and displaying an image while rotating the video projector horizontally so that the position of the projected image of the video projector moves.

[0002]

2. Description of the Related Art Conventionally, in an image display system for projecting and displaying an image such as a computer graphic on a wall or a screen by a video projector, for example, the video projector is moved so that the position of the projected image of the video projector moves. There is a system having a function of projecting and displaying an image while rotating in the horizontal direction. However, in a conventional system, an image represented by an input image signal is processed regardless of a place (position) where the image is projected and displayed. It was usual to display the projection without any change.

[0003]

However, for example, a video projector is installed in the middle of a square room, and an image is projected and displayed on a screen attached to the wall of the room while rotating the video projector horizontally. In this case, the image displayed when the video projector is located at a position where the display surface of the wall or the screen does not face the projection lens of the video projector is distorted (particularly, at the four corners of the room). (The image projected in the direction has a high degree of distortion), and the image is displayed in a state different from the original image. To eliminate such distortion of the image, projection using a rotating video projector is performed. Screens and walls must be installed in a square room in a cylindrical shape so that they always face the lens. There is a problem that bought.

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems, and displays an image while rotating the video projector in a horizontal direction so that the position of the image projected by the video projector moves with a simple and low-cost configuration. In this case, it is an object to provide an image display system capable of projecting and displaying an image having no distortion in shape.

[0005]

In order to solve the above-mentioned problems, an image display system according to the present invention comprises: a video projector for projecting an image; rotating means for rotating the video projector in a horizontal direction; And an image conversion unit that converts an image indicated by the image signal supplied to the video projector according to the rotation operation of the video projector by the rotation unit and supplies the converted image signal to the video projector.

(Operation) With the above configuration, when an image is projected and displayed while rotating the video projector in the horizontal direction so that the position of the projected image of the video projector moves, an image having no distortion in shape is projected. Can be displayed.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, as an embodiment of the present invention, a computer as a source of an image signal is connected to a video projector, and an image corresponding to the image signal generated by the computer is displayed on a wall or a screen. For a system that controls the rotation operation of the video projector that rotates the video projector in the horizontal direction by another computer while projecting and displaying the video projector, the projection image position of the video projector is moved.
This will be described in detail with reference to the drawings.

FIG. 1 is a block diagram showing a schematic configuration of an image display system according to an embodiment of the present invention.

In FIG. 1, reference numeral 2 denotes an operation unit such as a keyboard and a mouse. Reference numeral 3 denotes a serial port for performing data serial communication, such as a modem port or a printer port. Reference numeral 4 denotes a display unit for projecting an image, which is a video projector. 1
Reference numeral denotes a control device, which is a computer that performs image processing calculations and controls image display by controlling the operation unit 2, the serial port 3, and the display unit 4. Reference numeral 7 denotes an electric turntable provided with a rotation motor for rotating a video projector as a display unit in a horizontal direction. Reference numeral 6 denotes a motor control board for controlling the rotation motor of the electric turntable 7. 5 is a control device for controlling the motor control board 6;
A computer provided separately from the controller 1 is configured to serially communicate data with the control device 1 via the serial port 3.

The operation of the image display system shown in FIG. 1 will be described below with reference to the flowchart of FIG.

The operation application software in the image display system according to the present embodiment is as follows.
This system is installed in a square room (or venue) and produced for the purpose of viewing images projected and displayed by a video projector.

In step S1 of FIG. 2, execution of the operation application software of the present system is started. The operating application software of the system is double-clicked on the icon corresponding to the operating application software of the system displayed on the monitor screen of the computer of the control device 1 by operating the mouse of the operation unit 2. Then, the execution is started.

In step S2 of FIG. 2, it is checked whether the command key "+ Q" has been operated on the keyboard of the operation unit 2. If the command key "+ Q" has been operated, the serial port 3 is closed in step S9. In S10, the operation application program of the present system ends.

On the other hand, if the command key "+ Q" is not operated on the keyboard of the operation unit 2, the process proceeds to step S3, where the control device 1 rotates the video projector by the angle θ in the horizontal direction. An image conversion process is performed on the original image.

The image conversion processing performed on the original image when the video projector is rotated in the horizontal direction by the angle θ in the step S3 in FIG. 2 includes the projection display image shown in FIG. With the projection display image shown in b), the position of the video projector (ie,
Since the shape of the displayed image changes depending on the rotation angle), a converted image is created from the original image based on the rotation angle θ of the video projector in advance.
This system is configured to project and display the converted image created by the image conversion process after the rotation operation of the video projector is completed.

Next, the above-mentioned image conversion processing will be described in detail.

First, focusing on the cut of light projected from the video projector, the cut of FIG. 4A corresponds to the circle of FIG. 3A, and the cut of FIG.
It corresponds to the ellipse in (b).

If the diameter of the circle in FIG. 3 (a) is L1 and the circle is rotated by an angle θ, the shape is transformed into an ellipse in FIG. 3 (b). The horizontal direction can be expressed as L1 / L2w, and the vertical direction can be expressed as L1 / L2h.

As shown in FIG. 5, if the distance from the video projector to the wall or screen on which the projected image is displayed is K, and the projection angle is α, the diameter L1 of the circle projected and displayed on the wall or screen is represented by L1. Is L1 = 2 * Ktanα
If the length of the ellipse projected and displayed in the horizontal direction at the position where the video projector is rotated in the horizontal direction by the angle θ is L2w, then L2w
= Ktan (θ + α) -Ktan (θ-α) = K [tan (θ +
α) -tan (θ-α)].

The distance from the center of the ellipse to the video projector is LK, and a = [Ktan (θ + α)
+ Ktan (θ-α)] / 2 = K / 2 [tan (θ + α) + ta
n (θ−α)], LK = K ^* K + a ^* a = K ^* K +
K ^* K / 4 ｛[tan (θ + α) + tan (θ−α)] ^* [tan
(Θ + α) + tan (θ−α)]｝, and if the vertical length of the ellipse is L2h, then L2h
2h = 2 ^* LKtanα.

Therefore, the horizontal direction is x pixels and the vertical direction is y pixels.
If the image composed of pixels is the original image, and the converted image projected and displayed at the position where the video projector is rotated by the angle θ in the horizontal direction is X pixels in the horizontal direction and Y pixels in the vertical direction, On the other hand, by performing the image conversion processing as described above,
The converted image has X = x ^* L1 / L2w, Y = y ^* L1 /
The image is converted into a new shape image such as L2h.

The rotation angle θ of the video projector
The value of the actual rotation angle d is “4” as shown in FIG.
5 ”(for example, when the actual rotation angle d is“ 112 ”, the value of the rotation angle θ of the video projector is“ 22 ”).

Then, after the above-described image conversion processing is performed in step S3 of FIG. 2 and a converted image is formed, the serial port 3 is opened in step S4, and the control device 5 is connected via the serial port 3. The value of the rotation angle θ of the video projector (0 ≦ θ <45)
Is transmitted as hexadecimal 2-byte command data (step S5), and the control device 5 receives the data indicating the value of the rotation angle θ of the video projector sent from the control device 1 via the serial port 3. ,
By operating the motor control board 6 in accordance with the data, the rotation operation of the rotary motor of the electric turntable 7 is controlled (step S6). When the rotation operation of the rotary motor is completed, the control device 1 is electrically rotated. A message indicating that the rotation operation of the rotary motor of the base 7 has been completed is sent (step S7), and the control device 1 outputs an image signal corresponding to the converted image formed by the image conversion process in step S3 to the display unit 4. Then, the video projector of the display unit 4 projects and displays the converted image corresponding to the supplied image signal on a wall or a screen (step S8).

The above steps S2 to S8
The above processing operations are repeated until the command key "+ Q" is operated on the keyboard of the operation unit 2.

As described above, in the present embodiment, in a system for projecting and displaying an image while rotating a video projector in the horizontal direction, an original image is displayed according to the current position (rotation angle) of the video projector. By performing an image conversion process in which a converted image is formed in real time, it is possible to prevent a shape distortion from occurring in the projected and displayed image.For example, even if this system is installed in a square room, presentation and It is possible to always perform installations and the like as works of art in a high-level state.

[0026]

As described above, according to the present invention,
With a simple and low-cost configuration, when an image is projected and displayed while rotating the video projector in the horizontal direction so that the position of the projected image of the video projector moves, an image having no distortion in shape is projected and displayed. It is possible to provide an image display system capable of performing the following.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a schematic configuration of an image display system as an embodiment of the present invention.

FIG. 2 is a flowchart showing an operation procedure of the image display system shown in FIG.

FIG. 3 is a diagram exemplifying a difference in the shape of an image displayed and projected due to a difference in a place (position) where the image is displayed by the image display system.

FIG. 4 is a diagram showing an example of the shape of an image projected and displayed by the image display system.

FIG. 5 is an explanatory diagram of an image conversion process in the image display system.

FIG. 6 is a diagram showing a relationship between a rotation angle θ of a video projector of the present image display system and an actual rotation angle value d.

[Explanation of symbols]

 1, 5 control device 2 operation unit 3 serial port 4 display unit 6 motor control board 7 electric turntable

Claims (5)

[Claims] A video projector for projecting an image; a rotating unit for rotating the video projector in a horizontal direction; and an image indicated by an image signal supplied to the video projector for rotating the video projector by the rotating unit. Therefore, an image display system comprising: an image conversion unit for converting and supplying the converted image to the video projector. 2. The image conversion means calculates a degree of distortion of an image projected and displayed after rotation according to a rotation angle of a video projector, and forms a converted image based on the calculation result. The image display system according to claim 1, wherein: 3. The image conversion means includes an arithmetic computer that calculates a degree of distortion of an image projected and displayed after rotation according to a rotation angle of the video projector, and forms a converted image based on the calculation result. The image display system according to claim 1, wherein: 4. The apparatus according to claim 3, wherein the rotating means includes an electric rotating table for rotating the video projector in a horizontal direction, and a control computer for controlling a rotating operation of the electric rotating table. The image display system according to 1. 5. The computer for operation and the computer for control are connected by a serial port, and are configured to exchange data with each other via the serial port. The image display system according to 1.