JPH0580925A - Pointing device for large-screen display - Google Patents

Abstract

PURPOSE:To provide the small-sized high-reliability and good-operability pointing device which can easily indicate part of an image displayed on the large-screen display from a remote place. CONSTITUTION:The pointing device 10 is equipped with a gyro for detecting a horizontal and a vertical tilt and when the pointing device is directed to a specific direction, its angle is detected to send data to a display device 20. The display device 20 moves a cursor 2 on the display according to the direction of the pointing device 10. Consequently, a panelist of presentation using the large-screen display can easily indicates desired coordinates to perform effective presentation.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pointing device for designating a specific coordinate of an image displayed by a display device, and more particularly when a large-screen display device is used to give a presentation to a large number of audiences. The present invention relates to a pointing device for a large screen display which is effective for designating coordinates of an image displayed by a display device of a screen.

[0002]

2. Description of the Related Art In recent years, an increasing number of examples have been presented in which a display device such as a large-screen projection display is used to display a moving image or image output by a computer for effective presentation. It is well known that pointing and displaying a displayed image is effective in giving a presentation. For this reason, a physical pointing rod, an indicator using a laser beam, and the like have been used. However, in the prior art, in order to physically specify the surface of the displayed image, it is possible to display the same image on the displays placed at two separate places, for example, because the audience is too large to fit in one room. When an image is displayed and explained by a single presenter, the voice can be reproduced at two or more places by a microphone and a speaker, but the place where the presenter points is indicated on the display where the presenter does not exist. There is the problem of not knowing.

Therefore, for example, Japanese Unexamined Patent Publication No. 64-4102
According to the publication No. 1, a screen being displayed by a computer or the like is monitored by a television camera or the like, and an actually displayed image is compared with image information of an original image to be displayed to detect a coordinate pointed from the outside and display it. It has been proposed to indicate the coordinates of an image by displaying an image that is a specific target at the coordinates specified on the screen.

However, with this method, it is necessary to install a device for reading out the screen being displayed in addition to the display device, and it has been difficult to realize good operability. Further, as a remote pointing device, a method of designating specific coordinates on the display by a remote controller device provided with a trackball or a joystick as shown in FIG. 2 can be considered. However, when trying to move a large distance with a trackball, it is difficult to use one hand and it is necessary to use both hands, which is not convenient. Further, the trackball and the joystick have a mechanical contact portion, which is problematic in terms of reliability.

[0005]

SUMMARY OF THE INVENTION An object of the present invention is to expect high reliability because it can be easily pointed with one hand even at any specific coordinates of an image displayed on a large screen and has no moving part. (EN) Provided is a remote type pointing device for a large screen.

[0006]

In order to solve the above-mentioned problems, according to the present invention, a user moves a pointing device by using a pointing device having means for detecting a deviation angle in a horizontal direction and a deviation angle in a vertical direction. Thus, the deviation amount is transferred to the display device, and the cursor is displayed at the coordinates desired by the user by moving the cursor on the display device by a movement amount according to the deviation angle.

[0007]

The user uses a pointing device which can freely change the direction in order to specify arbitrary coordinates on the display. The pointing device is equipped with a gyro to detect the direction in which the pointing device is directed. As a gyro, there are a gyro that applies the principle of spinning tops and a gyro that detects the Coriolis force generated in a vibrator with a strain gauge. The displacement angle detected by the pointing device is transmitted to the display device to change the position of the cursor displayed on the display. This allows the user to freely move the position of the cursor on the display simply by changing the tilt of the pointing device.

In order to initialize the relationship between the tilt of the pointing device and the position of the cursor on the display, the pointing device is provided with a reset button, and when the reset button is pressed, the cursor moves to specific coordinates on the display. To do so.

Further, in order to specify the size of the tilt of the pointing device and the size of the movement distance of the cursor on the display, the pointing device is provided with a switch for adjusting the ratio of the movement distance of the pointing device and the cursor. .. Alternatively, the tilt of the pointing device is registered at coordinates of two or more specific points on the display, and the rate of cursor movement is calculated from the difference between the horizontal and vertical coordinates on the display and the horizontal and vertical tilt of the pointing device at that time. Establish.

[0010]

1 is a block diagram of an embodiment of the present invention. In the figure, component 1 is a display, 2 is a cursor, 10 is a pointing device, 11 is a gyro, 12 is a gyro,
Reference numerals 13 and 14 are A / D converters, 15 is an interface, 16 is a reset button, 20 is a display device, 21 is an interface, 22 is an integration device, 23 is a coordinate storage device, 24 is reset control means, and 25 is a display circuit. ..

The display 1 is a large screen projection display for giving a presentation. A rear projection type, a front projection type, a CRT or the like can be considered as a system, but the present invention is not particularly limited thereto. Moreover, it is not necessary to set a specific range for the size. The cursor 2 is a special display image for pointing a specific place on the display screen, and is usually shaped like an arrow so that it can be easily identified from the image behind it. Pointing device 10
Is a device for designating the coordinates of the cursor 2 on the display 1. The gyro 11 is the pointing device 10.
It is a sensor for detecting the horizontal displacement angle of the, and detects the angular velocity in the change in the physical position received by the pointing device 10. The gyro that detects the angular velocity is
For example, a piezoelectric vibrating gyro as described in Nikkei Electronics 1990.11.26, page 183 can be used, but refer to the above-mentioned reference for details such as theory.

The gyro 12 is similar to the gyro 11, but is arranged in a direction different from the gyro by 90 degrees in order to detect the angular velocity in the vertical direction. The A / D converters 13 and 14 are the gyro 11 and the gyro 12, respectively.
It is a converter for converting the angular velocity output from the digital data. The angular velocity data converted into digital data is transferred from the interface 15 to the display device 20. The display device 20 receives the data sent from the pointing device 10 through the interface 21, and the data transfer method may be a wireless method using infrared rays or radio waves, or a wired method. In this embodiment, the wireless system is used for the time being.

When the user wants to move the cursor 2 on the display 1 to the left or right, first, the pointing device 10 is tilted left or right. Since the gyro 11 is fixed to the pointing device 10, it outputs a voltage proportional to the angular velocity dwx / dt given to the pointing device 10. The A / D converter 13 converts the output data into digital data and converts it into an interface 15
Then, the angular velocity data is sent to the display device 20. The display device 20 receives the data sent from the pointing device 10 through the interface 21. The received angular velocity data is integrated by the integrator 22 in the time axis direction to calculate the displacement angle wx. The displacement angle wx is the coordinate storage device 2
3 is stored.

The display circuit 25 is a circuit for displaying the contents of the storage device storing the image information on the display.
The image desired by the user is displayed on the display 1. Further, the cursor 2 can be displayed by being superimposed on the image being displayed, but in order to give the cursor 2 being displayed the coordinates according to the displacement angle wx recorded in the coordinate storage device 23, the user can By tilting the pointing device 10 to the right, the displayed cursor 2 moves to the left or right in the screen of the display 1.

The same applies when the user wants to move the cursor 2 on the display 1 up and down. Gyro 1 when tilting the pointing device 10 up or down
Since 2 is fixed to the pointing device 10, it outputs a voltage proportional to the angular velocity dwy / dt given to the pointing device 10. The A / D converter 14 converts the output data into digital data and sends the angular velocity data to the display device 20 through the interface 15.
The display device 20 receives the data sent from the pointing device 10 through the interface 21. The received angular velocity data is integrated by the integrator 22 in the time axis direction to calculate the displacement angle wy. The displacement angle wy is stored in the coordinate storage device 23.

The display circuit 25 gives the coordinates corresponding to the displacement angle wy recorded in the coordinate storage device 23 to the cursor 2 being displayed, so that the user tilts the pointing device 10 up and down to move the cursor 2 being displayed. Since it moves up and down on the screen of the display 1, the user can move the cursor to desired coordinates.

In the case of the present embodiment, when the user starts using the pointing device 10, it is necessary to initialize the position of the cursor 2 and the orientation of the pointing device 10 in the initial state. When performing initialization, the user first points the pointing device toward the center of the display 1 and presses the reset button 16. The interface 15 notifies the interface 21 of the display device 20 that the reset button 16 has been pressed. The interface 21 informs the reset control means 24 that the reset button 16 of the pointing device 10 has been pressed. Reset control means 24
Initializes the data of the coordinate storage device 23 and sets the coordinate of the cursor 2 to the center of the display 1. As a result, the display circuit 25 displays the cursor 2 in the center of the display 1. The integration device 22, the coordinate storage device 23, and the reset control means 24 can be realized by a hardware circuit,
It can also be realized by software of a microcomputer.

FIG. 3 is a block diagram of an embodiment of the present invention. In the embodiment of FIG. 1, since the ratio of the displacement angle of the pointing device 10 and the movement amount of the cursor 2 is fixed, it is inconvenient when the user wants to move the cursor 2 fast or slowly and accurately. Can be considered. Therefore,
In the present embodiment, the pointing device 10 is provided with a speed adjusting switch so that the displacement angle of the pointing device 10 and the movement amount of the cursor 2 can be adjusted. In the diagram of FIG.
Since the components 1 to 25 are the same as the components having the same numbers in FIG. 1, description thereof will be omitted.

Component 31 is a speed control switch, 3
2 is a speed control means and 33 is a multiplier. When increasing or decreasing the speed of the cursor 2, the user operates the speed control switch 31 to set a desired speed.
The speed control switch 31 is composed of, for example, two buttons, one button for increasing the speed and the other for speed deceleration.

When the user changes the speed of the cursor 2 on the display 1, the speed control switch of the pointing device 10 is operated to set the moving speed of the cursor 2. The interface 15 sends the data of the set speed to the display device 20. The display device 20 uses the data sent from the pointing device 10 for the interface 2
Received by 1. The received speed data is set in the multiplier 33 by the speed control means 32. After the integrating device 22 integrates in the time axis direction to calculate the displacement angle wy, the multiplier 33 calculates the product of the displacement angle wy and the value corresponding to the velocity of the cursor 2, and the result is the displacement angle wy as the coordinate storage device 23. Memorized in. The display circuit 25 gives the coordinates corresponding to the displacement angle wy recorded in the coordinate storage device 23 to the cursor 2 being displayed, so that when the speed of the cursor 2 is set low, the cursor moves to the displacement angle of the pointing device 10. 2 moves only slightly, on the contrary, when the speed of the cursor 2 is set to be high, the cursor 2 moves greatly even if the displacement angle of the pointing device 10 is small.

FIG. 4 is a block diagram of an embodiment of the present invention. In the present embodiment, the pointing device 10 is provided with a coordinate calibration switch so that the displacement angle of the pointing device 10 and the movement amount of the cursor 2 can be adjusted. Component 41 is a calibration switch, 42 is CP
U and 43 are ROMs, and 44 is RAM.

When the user sets the speed of the cursor 2 on the display 1, the user operates the calibration switch 41 of the pointing device 10 to set the calibration mode. For example, the calibration switch 41 enters the calibration mode when it is pressed once, registers the point A when it is pressed next time, and registers the point B when it is pressed the third time. The interface 15 notifies the display device 20 that the calibration switch 41 has been pressed. The display device 20 receives the information sent from the pointing device 10 through the interface 21 and transmits it to the CPU 42. The CPU 42 enters the calibration mode by the display circuit 25 and causes the display 1 to display the points A and B, which serve as the calibration marks. here,
The difference between the horizontal coordinates of points A and B is dx, and the difference between the vertical coordinates is dy. The points A and B are placed on the diagonal line of the display 1.

Next, the user points the pointing device 10 at point A and presses the calibration switch 41.
This causes the CPU 42 to set the value in the coordinate storage device to a specific value,
For example, set the value to 0 and the value to be multiplied by the multiplier 33 to 1
Set to. Next, when the user points the pointing device 10 toward the point B and presses the calibration switch, the displacement angle in the horizontal direction and the displacement angle in the vertical direction recorded in the coordinate storage device 23 are obtained. Next, the speed of the cursor 2 is obtained by dividing the difference between the coordinates of the points A and B by the horizontal and vertical displacement angles, and the value is set in the multiplier 33. As a result, the user can perform calibration so that the cursor 2 moves to any position on the display 1 with the pointing device.

FIG. 5 shows a processing flow of the CPU 42 inside the display device 20 in this embodiment. In the figure, component 51
Reference numerals 62 to 62 show the contents of the processing. The CPU 42 started in process 51 checks in process 52 whether the calibration mode is selected. When the calibration mode is selected, points A and B are displayed on the diagonal line of the display 1. The user first directs the pointing device 10 toward the point A and presses the calibration switch 41 to initialize the displacement deviation angle of the pointing device 10. Next, by pointing the pointing device 10 toward the point B and pressing the calibration switch 41, the horizontal and vertical displacement angles dwx and dwy of the pointing device 10 are obtained. When the difference between the horizontal and vertical coordinates of the points A and B is dx and dy, the horizontal speed vx is represented by dx / dwx. Further, the vertical speed vy can be calculated by dy / dwy, and vx, vy
Is set in the multiplier 33 by the CPU 42. Process 5
If the calibration is not selected in step 2, the reset processing is confirmed in step 58, and if the reset is selected, the displacement angles wx and wy and the cursor 2 are set in step 59.
The coordinates of are initialized.

Next, in process 60, it is checked whether the pointing device 10 has been shaken. If it is shaken, the deviation angle is calculated by integrating the output of the gyro in step 61, and the cursor 2 is moved in step 62 according to the deviation angle.

[0026]

According to the present invention, since the coordinates can be input by simply changing the direction of the pointing device, it is possible to easily specify a specific coordinate on the screen with one hand. Further, when the vibrator is used for detecting the inclination, the mechanical contact portion can be omitted, and downsizing and cost reduction can be realized. Further, by providing a coordinate reset switch, the cursor on the display can be easily initialized to specific coordinates. Further, by providing the means for adjusting the moving speed of the cursor, the operability can be improved by adjusting the relationship between the pointing device and the moving amount of the cursor. By calibrating the cursor position and the movement amount at two or more points on the display, it is possible to easily set the relationship between the cursor position on the display and the orientation of the pointing device.

Further, the pointing devices are connected to each other by 9
By having three gyros arranged at an angle of 0 °, it is possible to detect not only the horizontal and vertical directions but also the twisting angle of the pointing device. It is also possible to give instructions.

[Brief description of drawings]

FIG. 1 is a block diagram of an embodiment of the present invention,

FIG. 2 is an explanatory diagram of a pointing device using a trackball,

FIG. 3 is a block diagram of a second embodiment of the present invention,

FIG. 4 is a block diagram of a third embodiment of the present invention,

FIG. 5 is a processing flowchart according to an embodiment of the present invention.

[Explanation of symbols]

1 ... Display, 2 ... Cursor, 10 ... Pointing device, 11, 12 ... Gyro, 13, 14 ... A / D converter, 15, 21 ... Interface, 16 ... Reset button, 20 ... Display device, 22 ... Integrating device, 23 …
Coordinate storage device, 24 ... Reset control means, 25 ... Display circuit.

Claims (5)

[Claims] 1. A pointing device having means for detecting horizontal and vertical deviation angles and means for transmitting the detected deviation angles, and a coordinate position indicated on the display according to the detected deviation angles. A pointing device for a large-screen display, comprising a display device for displaying on a screen. 2. The pointing device for a large screen display according to claim 1, further comprising a gyro device as a means for detecting a deviation angle between a horizontal direction and a vertical direction. 3. A pointing device having means for detecting deviation angles in the horizontal and vertical directions, means for transmitting the detected deviation angles, and a pointing button for resetting display coordinates, and the detected deviation angles and the reset. A receiving device that detects that the button has been pressed, a display device that displays the coordinate position indicated on the display according to the transmitted displacement angle, and the specified coordinate position when the reset button is pressed. A pointing device for a large screen display, comprising: 4. A pointing device comprising means for detecting deviation angles in the horizontal and vertical directions, means for transmitting the detected deviation angles, and a switch for instructing a moving speed of a cursor indicating a display position on a display. A device, a receiving means for detecting that the switch for instructing the detected displacement angle and the moving speed of the cursor is pressed, and a coordinate position instructed according to the transmitted displacement angle are displayed on the display. A pointing device for a large-screen display, comprising: a display device; and means for setting a moving speed of a cursor to a specified value when a switch for instructing a moving speed of a cursor is pressed. 5. A pointing device having means for detecting deviation angles in the horizontal and vertical directions, means for transmitting the detected deviation angles, and a pointing device having a switch for performing calibration, and the detected deviation angles and The receiving means for detecting that the switch for performing the calibration is pressed, the display device for displaying the coordinate position instructed according to the transmitted deviation angle on the display, and the switch for performing the calibration are pressed. In this case, two or more specific coordinates are displayed on the display and the coordinates are pointed to by the pointing device, and then calibration is performed to determine the pointing direction of the pointing device and the cursor displayed on the display. For a large-screen display, characterized in that it comprises means for setting the position and the moving speed of the cursor In computing devices.