JPH1091344A - Data input device for personal computer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform a function equivalent to the operation of a mouse for a laser beam pointer by reading the beam wavelength of the pointer to convert it into mouse control data which can be treated by a personal computer and then controlling this computer. SOLUTION: An explainer points the necessary parts of the data, etc., shown on the screen of a personal computer 1 that is projecting on a screen 4 by means of a laser beam pointer 5. The pointer 5 has several different wavelengths and also has a function to switch these wavelengths. Then the laser wavelength that is different from that of a pointing action given on a screen 4 in an ordinary explanation mode is used as the base data on the signal that causes the actions such as the drags, etc., of a mouse when the computer 1 is used on an ordinary desk. The image data photographed by a photographing device 6 are converted into the image data which are treated by the computer 1 within a control board 7.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a screen projection device suitable for use as an image projection device of a higher-level device such as a personal computer, and more particularly to a photographing device for photographing a screen projected on a screen, a visible wavelength laser beam pointer, and photographing data. In particular, the present invention relates to a data input control device system for a personal computer that effectively functions a mouse operation of the personal computer by providing a control circuit.

[0002]

2. Description of the Related Art At a presentation or the like, when giving a description accompanying a presentation, a presenter uses an overhead projector to project a diagram, a graph, or a description related to the presentation on a screen so that the user can understand the description more clearly. It is common practice to indicate easily. At this time, the screen projection portion corresponding to the explanation can be indicated by using a long pointing rod or the like to indicate a necessary portion of the image projected on the screen, or to indicate a necessary portion of the sheet loaded in the overhead projector. I was In recent years, this type of instruction has
Laser beam pointers using visible wavelength light have also been used in place of the pointing rod, and the presenter can freely take the position for explanation without waiting near the screen or near the overhead projector. However, when exchanging the explanation sheet on the overhead projector, the explainer himself or his cooperator exchanges the sheet with a sheet created in advance necessary for the explanation.

In recent years, this sheet exchange work has been realized by mounting the apparatus on an overhead projector so that an image output from a personal computer can be directly projected on a screen. Image data necessary for explanation is stored in the personal computer or in a file in advance. By outputting image data stored in a medium from a personal computer as an image, many explanatory materials can be easily projected on a screen via an overhead projector.

[0004] However, even if such a device is used, the change to the image data necessary for the explanation of projection on the screen can still be made by the user himself or herself operating the keyboard or mouse which is the input device of the personal computer. In order to change the displayed image, the cooperator operates the personal computer and selects image data stored in the personal computer or a file medium.

[0005]

In the conventional method, in order to handle a personal computer, such as changing image data projected on a screen via an overhead projector, a keyboard or a personal computer of the personal computer is used. It is necessary for the presenter to move to a place where the mouse can be operated, or for the cooperator to operate the keyboard or mouse of the personal computer, and while the presenter is making the presentation, change the screen required for the presentation to the current explanation position It was impossible to do without moving from. The present invention is based on a graphic user interface provided in a personal computer in recent years, and performs a function equivalent to a mouse operation on a display screen when used on a desk or the like by using a screen, a photographing device, a laser beam pointer, and a personal computer. The purpose is to provide a function to be performed.

[0006]

In order to achieve the above object, it is necessary to newly provide a method for inputting data to a personal computer. Generally, data input to a personal computer is generally performed using a keyboard or a mouse. Therefore, in a situation where an overhead projector is used as in the present problem, data input means to another personal computer is required. In such a situation, the only device that can be used for input is the laser beam pointer used by the explainer,
Data input means using this can be performed without newly using many devices. Since the laser beam pointer literally uses a laser beam of visible wavelength, if there is a mouse cursor that can read this wavelength and convert it into mouse control data that can be handled by a personal computer, data can be easily input to the personal computer by using a personal computer. Can control the computer.

In order to input data to a personal computer, it is necessary to take in projected screen image information and convert it into data that can be handled by the personal computer. The present invention uses a laser beam pointer that projects an image of a screen on which an output image from a personal computer is projected via an overhead projector, and further has several different laser wavelengths and has a function of arbitrarily switching between them. By switching the wavelength of the laser beam to irradiate the screen as necessary, the difference in the wavelength of the laser beam moving on the screen is photographed, and the data is converted to a personal computer based on the photographed data. Take control. Since the captured image has distortion and distortion, a correction is made to match the display screen output by the personal computer. This is to determine whether the position indicated by the laser beam pointer accurately points to an area that can be controlled by a personal computer. Converts the wavelength of the laser beam into a signal similar to a mouse drag and click operation on the display screen of a personal computer, and matches the image output information in the personal computer with the captured screen image Thus, the point position of the laser beam is determined, and the presenter can face the screen and control the personal computer while watching the screen.

[0008]

Embodiments of the present invention will be described below in detail.

FIG. 1 shows an apparatus configuration of the present invention. 1 is a personal computer, 2 is an overhead projector, 3 is an overhead projector display device,
Reference numeral 4 denotes a screen, 5 denotes a laser beam pointer, 6 denotes a photographing device, and 7 denotes a control board.

In FIG. 1, a personal computer 1
Has stored the image data of the materials and graphs necessary for the presentation in a personal computer or a file medium in advance, launches a program to output the images required for the presentation, and then transfers the image data to an overhead projector. Output to the display device 3. Display device 3
Is installed in the overhead projector 2 and the personal computer display screen and materials,
The graph is projected on the projection screen 4. The image capturing device 6 captures an image projected on the screen 4. At this time, a zoom function is provided so that an image is taken on the entire photographing screen of the photographing device 6, and adjustment is performed using this. The presenter points to a necessary part, such as a material displayed on the screen of the personal computer, projected on the screen 4 using the laser beam pointer 5. Usually, this laser wavelength is not set to a wavelength for controlling a personal computer. The laser beam pointer 5 has several wavelengths and has a function of switching between them. When a laser wavelength different from the pointing at the time of ordinary explanation is pointed on the screen 4, the personal computer is used as basic data of a signal for performing a drag and click operation in a mouse operation when used on an ordinary desk. Image data photographed by the photographing device 6 is converted into image data that can be handled by the personal computer 1 in the control board 7. At the same time, it is determined whether the wavelength emitted from the laser beam pointer 5 is a wavelength for performing the mouse operation or not, and is similarly converted as the mouse cursor position of the personal computer 1 and the control data. The presenter operates the personal computer 1 and changes the image output screen by changing the irradiation wavelength of the laser beam pointer 5 on the screen without moving the personal computer 1 to a position where the keyboard or mouse can be operated.

FIG. 2 shows a process of converting a photographed image into data of the personal computer 1. 8 is an image input pixel, 9 is a pixel data memory, 10 is a correction circuit, 1
1 is a wavelength analysis circuit, 12 is a wavelength data transfer circuit, 13 is a correction data memory, 14 is a video RAM, 15 is a position correction circuit, 16 is a mouse cursor position and control data converter, 17 is a video RAM controller, and 18 is a CPU.
Represents

An image of the screen 4 taken by the photographing device 6 is passed through an internal image input pixel 8 to a pixel data memory 9.
Once taken into. The wavelength analysis circuit 11 is a screen 4
It is determined whether the laser beam wavelength of the laser beam pointer pointed to above is the wavelength at the time of just pointing or the wavelength switched to perform the mouse operation. The determined information is passed to the mouse cursor position and control data converter 16 through the wavelength data transfer circuit 12.
The captured image is tilted or distorted due to the position of the screen 4 or the positional relationship of the image capturing device 6, and cannot be handled as it is as the same as the image data of the personal computer. When the wavelength indicated by the laser beam pointer 5 indicates mouse operation, the video RAM actually output from the personal computer 1
If the area does not match the mouse click operation and the drag operation area on the image data of No. 14, the operation intended by the explainer cannot be given to the personal computer. . The correction circuit 10 corrects the inclination and distortion of the image data stored in the pixel data memory 9, and the image data is stored again in the correction data memory 13. Since the image data stored in the correction data memory 13 is not the same as the image data output by the personal computer, the CPU 18 and the video RAM controller 17 match the image data output to the video RAM 14 and output from the personal computer 1. Then, the position of the captured image data is further corrected, and the mouse cursor position indicated by the laser beam pointer 5 and the contents of mouse control are finally determined. The mouse cursor position data and the mouse control data are transmitted to the CPU 18 of the personal computer 1 and a program for controlling the mouse to perform necessary mouse operations.
Thereafter, the video output data of the personal computer 1 is rewritten by controlling the video RAM controller 17, and the screen projection screen can be changed to the specified display content.

[0013]

According to the present invention, in a presentation using a personal computer and an overhead projector, mouse operation control when using a personal computer on a desk can be easily performed using a laser beam pointer. Can be done.

[Brief description of the drawings]

FIG. 1 is a diagram showing a device configuration necessary for realizing the present invention.

FIG. 2 is a diagram showing a circuit configuration for converting video data after screen shooting into data of a personal computer.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Personal computer, 2 ... Overhead projector, 3 ... Overhead projector display device, 4 ... Screen, 5 ... Laser beam pointer, 6 ... Photographing device, 7 ... Control board, 8 ... Image input pixel, 9 ... Pixel data memory, 10 ... correction circuit,
11: wavelength analysis circuit, 12: wavelength data transfer circuit, 13
... Correction data memory, 14 ... Video RAM, 15 ... Position correction circuit, 16 ... Mouse cursor position and control data converter, 17 ... Video RAM controller, 18 ... CP
U.

Claims (2)

[Claims] 1. A personal computer, a display device capable of outputting an image output from the personal computer to an overhead projector, a screen for projecting the image output, a laser beam pointer capable of pointing a light spot on the screen, and a screen projected on the screen. It consists of a control board that can capture an image, detects and determines the wavelength of the laser beam pointer, and replaces the detected and determined data with a mouse operation instruction to a personal computer, and sends mouse operation data to the personal computer. A data input device for a personal computer, which has a function. 2. The data input device for a personal computer according to claim 1, wherein the laser beam pointer according to claim 1 has a function of changing a laser beam wavelength.