JPH0580928A - Screen display system - Google Patents

Abstract

PURPOSE:To move a cursor projected on a screen according to the indication of a pointer by providing the pointer itself with a mouse function. CONSTITUTION:This screen display system consists of a ball 11 which is formed in a rod shape and can freely rotate while moving on a display screen provided at the tip part, the pointer 1 equipped with a detecting means which detects the numbers of horizontal and vertical rotations of the ball 11, and an image processor equipped with a means which displays an image including the cursor on the display screen, finds the movement of the painter 1 from the numbers of rotations detected by the detecting means, and moves the cursor. Namely, the same function as a mouse is provided atop of the painter 1. When this pointer 1 is used, the tip end part is rubbed and moved on the screen and then the ball 11 rotates by this movement, so that its rotational frequency data (moving direction and movement distance) are detected. Consequently, the cursor can be moved to draw a picture.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a screen display system capable of moving a cursor projected on a screen in accordance with pointer instructions.

[0002]

2. Description of the Related Art Currently, a liquid crystal panel for projecting an image output of a personal computer on a screen by an OHP device has been put into practical use. The liquid crystal panel has a transmissive liquid crystal display unit, and the image displayed on this display unit is projected on the screen by the light of the OHP device.

On the computer screen, a line drawing can be drawn by moving the cursor, and a menu, an icon, etc. can be selected by the cursor. When operating at the desk, move the cursor displayed on the CRT with the mouse and click the mouse switch.
When projecting an image on the screen, the operator usually explains in front of the screen, and thus it is troublesome to move the cursor or operate the click switch using the mouse.

Therefore, a device has been put into practical use in which an LED or the like is provided at the tip of the pointer to emit light, the image is received by the camera to determine the position, and the cursor is displayed at the position on the screen that corresponds to this position. Has been done.

[0005]

However, in such a system, the angle of view of the screen differs depending on the distance between the camera and the screen, and the angle of view of the screen on the left and right differs depending on the angle between the camera and the screen. Since the optical axis of and the center of the screen may not match, extremely complicated processing is required to determine the position where the cursor is displayed from the position of the tip of the pointer received by the camera, and the setting restrictions are also large. There was a flaw.

Since the system uses a recognition process using a camera, the response time of the processing time is delayed with respect to the target position detection of the pointer, and when the drawing function is performed, the pointer operated by the operator is operated by the pointer. The trackability of is poor.

Further, the system using the camera is expensive, and there is a drawback that the cost of the pointer position detecting function in the function of the entire system becomes large.

It is an object of the present invention to provide a pointer that solves the above problems by providing the pointer itself with a mouse function.

[0009]

SUMMARY OF THE INVENTION According to the present invention, a ball which is formed in a rod shape and which is provided at the tip of the ball and is rotatable while moving on a display screen described later, and the number of rotations of the ball in the horizontal and vertical directions are described. The image processing including a pointer including a detection unit for detecting, an image including a cursor on a display screen, and a unit for moving the cursor based on rotation speed data detected by the detection unit. And a device.

[0010]

The pointer of the present invention has the same function as a mouse at the tip of the pointer. That is, a rotatable ball and detection means for detecting the number of vertical and horizontal rotations of the ball are provided. When using this pointer, move it while rubbing the tip on the screen. This movement causes the ball to rotate and its rotation speed data (movement direction, movement distance) is detected.

The image processing apparatus determines the movement of the pointer based on the rotation speed data detected by the detection means, and moves the cursor in accordance with the movement.

[0012]

FIG. 1 is a diagram showing the configuration of a screen display system according to an embodiment of the present invention. An image of the personal computer 3 is displayed on the screen 5. The image data of the personal computer 3 is displayed by the liquid crystal panel 2 provided on the OHP device 4. The liquid crystal panel 2 is connected to the personal computer 3 and displays the image data input from the personal computer 3 on the transmissive liquid crystal unit. The displayed image is projected on the screen 5 by the light of the OHP device 2. The pointer 1 is used by a user (explainer) to explain an image displayed on the screen 5 by hand, and is also used to move and click the cursor displayed on the screen 5.
When the user moves the cursor, the tip of the pointer (ball 11) is applied to the position where the cursor is displayed on the screen, and the tip of the pointer is moved while rubbing the screen. Rotate. This rotation speed data is used for the personal computer 3
Is transmitted to, and the cursor is moved according to the movement of this pointer. The click switch 13 is turned on at a predetermined position. The image output from the personal computer 3 and displayed on the liquid crystal panel 2 is projected on the screen 5 by the light of the OHP device 4. The personal computer 3 has a drawing function for tracing the movement of the cursor. The displayed image also includes a pull-down menu, an icon, etc. When the cursor is moved to this position and the click switch 13 is turned on, the function corresponding to that menu operates.

FIG. 2 is an external view of the pointer. The pointer 1 is formed in a rod shape having a grip 12,
The ball 11 of the mouse portion 10 projects at the tip thereof. The ball 11 is rotatable in any direction. A click switch 13 is provided above the grip 12. The click switch 13 can be operated by the index finger when the user holds the grip 12 with the right hand (or the left hand).

FIG. 3 is a detailed view of the mouse ball portion 10 including the pointer ball 11.

The ball 11 is a roller 1 for detecting the X-axis rotation.
5, it is supported by a roller 16 for Y-axis rotation detection and an auxiliary roller (not shown). A pressing member 17 composed of a coil spring and a bearing is provided on the opposite side of the opening to urge the ball 11 toward the opening. As a result, even if the pointer 1 is used sideways, the ball 11 projects from the opening. By moving along the screen 5, the ball rotates and its rotation is detected by the rollers 15, 16. Further, FIG. 3B is a diagram showing the configuration of a support portion that rotatably supports the mouse ball portion 10. The pointer is used while being tilted at various angles, but in order to detect the number of rotations of the ball 11 in the X and Y axes, the rollers 15 and 16 must always be oriented at right angles to the X and Y axes, respectively. .. Therefore, the mouse ball portion 10 is rotatably supported by a bearing 18, and a weight 19 is attached to the bottom portion of the mouse ball portion 10. Further, the lead wire of an encoder (not shown) for reading the rotation speeds of the rollers 15 and 16 is also taken out from the bottom. As a result, the center of gravity of the mouse ball portion 10 comes from the bottom portion and the rollers 15 and 1 can be moved no matter how the pointer 1 is moved.
6 is perpendicular to the X and Y axes.

FIG. 4 is a block diagram showing the electrical construction of the screen display system. Mouse ball part 1 of pointer 1
The 0 and click switch 13 are connected to the control circuit 33. The control circuit 33 is connected to the transmission circuit 34. The control circuit 33 encodes the encode data indicating the number of rotations of the rollers 15 and 16 input from the mouse ball 10 and the on / off data of the click switch 13. The coded data is output to the transmission circuit 34. The transmission circuit 34 modulates a high frequency with this code and outputs it as an electromagnetic wave. A receiving circuit 35 is connected to the personal computer 33 via a communication interface 39-control circuit 36. Further, the image data is output to the liquid crystal panel 2 via the amplifier 40 and the display timing generation circuit 38. The receiving circuit 35 receives the electromagnetic wave modulated by the code data and demodulates it into code data.

The demodulated code data is sent to the control circuit 36,
It is input to the personal computer 3 via the communication interface 39. The personal computer 3 moves the cursor based on this data, and changes the screen display when the click switch 13 is turned on. The display timing generating circuit 38 is a circuit that synchronizes the mouse followability with the screen display.

With such a structure, the cursor can be moved or drawn by aligning the tip of the pointer with the displayed cursor and tracing it on the screen.

[0019]

As described above, according to the present invention, the cursor displayed on the large screen can be moved by using the pointer with a simple system configuration.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a screen display system according to an embodiment of the present invention.

[Figure 2] External view of the pointer of the same screen display system

FIG. 3 is a diagram showing a configuration of a mouse ball portion of the pointer.

FIG. 4 is a diagram showing an electrical configuration of the screen display system.

[Explanation of symbols]

 1-Pointer 2-Liquid Crystal Panel 3-Personal Computer 4-OHP Device 5-Screen 10-Mouse Ball Part 11-Ball 13-Click Switch

Claims (1)

[Claims] 1. A pointer and an image processing device, wherein the pointer is formed in a rod shape and is provided at a tip portion thereof and is rotatable while moving on a display screen described later, and a horizontal position of the ball. A detection means for detecting the number of rotations in the direction and the vertical direction, the image processing device displays an image including a cursor on a display screen, and displays the cursor based on the number of rotations data detected by the detection means. A screen display system comprising: means for moving.