JPS61183734A - Coordinate input device of display - Google Patents

Abstract

PURPOSE:To detect a moving extent which does not depend on an inclination by placing separately in the direction Y two balls which rotates together with a case which can detect the moving extent, and correcting the moving extent by deriving a rotational angle of the case from an output of an X direction moving extent detecting sensor which has been placed in both the balls. CONSTITUTION:A mouse is constituted by installing separately in the direction Y cases 2-1, 2-2 which rotate together with movement of a case, in the inside of the case, detecting sensors 3-1, 3-2 of each Y and X direction moving extent are placed in contact with the ball 2-1, and an X directoin moving extent detecting sensor 3-3 is placed in contact with the ball 2-2. In this state, an output pulse of sensors 3-2, 3-3 is counted by counters 4-1, 4-2 and its integrating output is inputted to a difference device 6, an output pulse of the sensors 3-1, 3-2 is counted by counters 7-1, 7-2 and its integrating output is inputted to a coordinate converter 9, and a moving extent of the directions X, Y is corrected by deriving a rotational angle from the initial direction of the mouse, based on an output of the difference device 6.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a coordinate input device such as a display device, and more particularly to a coordinate input device that can move coordinates at high speed and with simple operations.

[Background of the invention]

2. Description of the Related Art In display devices for personal computers and workstations, a mouse is widely used as a device for specifying a location on the screen for inputting characters or figures. The mouse is placed on a desk ring, the amount of movement of the mouse in the X direction and the Y direction is detected, and this is communicated to the display device.
Based on this information, the display device determines the position on the screen at which characters or figures are input. However, with conventional mice, if a twist (rotation around the Z-axis of the main body) is applied during movement, However, there was a problem in that the output values in the X and Y directions were not output correctly. In other words, the output is different when the mouse is moved without twisting as shown in Figure 1(a), and when the mouse is moved with a twist as shown in Figure 1(b). There was a problem.

[Purpose of the invention]

An object of the present invention is to provide a coordinate input device that can output a relative displacement from a reference point without depending on the inclination of the coordinate itself.

[Summary of the invention]

In order to achieve the above object, the present invention provides a coordinate input device with a first
A rotating pole is provided, and a second rotating pole is separately provided at a position on the Y-axis passing through the center of the first rotating ball to detect the amount of movement in the X direction. Find the twist rotation angle of the device from the reference direction from the difference,
Based on these values, the amounts of movement in the X and Y directions are corrected to the amounts of movement in the X and Y directions when the device was facing the reference direction.

[Embodiments of the invention]

Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 2 is a diagram showing the appearance of an embodiment of the coordinate input device (hereinafter referred to as a mouse) according to the present invention, and FIG. 2(a) is a bottom view;
FIG. 2(b) is a front view. FIG. 3 is a block diagram showing the system configuration.

Balls 2-1 and 2-2 are installed inside the box 1 so that they can rotate freely. Ball 2-1 detects the amount of mouse movement in the X-axis direction and Y-axis direction in the mouse-specific coordinate system, and ball 2-2 detects the amount of mouse movement in the X-axis direction and Y-axis direction in the mouse-specific coordinate system.
It is located on the Y-axis passing through the center of the mouse, and is used to detect the amount of mouse movement in the X-axis direction.

The ball 2-1 rotates around the Y axis when the box 1 moves in the X direction, and rotates around the Y axis when the box 1 moves in the Y direction. The same applies to ball 2-2.

Sensors 3-1 and 3-2 are respectively connected to the Y of ball 2-1.
A number of electric pulses Y and X are output in proportion to the amount of rotation in the direction and the X direction. The sensor 3-6 outputs a number of electric pulses proportional to the amount of rotation of the ball 2-2 in the X direction. Counters 4-1 and 4-2 are connected to sensors 3-2 and 5, respectively.
Count -6 output pulses. The reset button 5 resets the contents of counters 4-1 and 4-2, 0 //
Cleared to (zero) to determine the initial direction of the mouse. The integrated outputs of the counters 4-1 and 4-2 are input to a differentiator 6, and the rotation angle θ from the initial direction of the mouse is calculated from the difference.

Counters 7-1 and 7-2 are reset by the output pulse P of periodic pulse generator 8, and sensors 3-1 and 3
Count the number of -2 output pulses. Counter 7-1
The integrated value outputs of and 7-2 are input to the coordinate converter 9.

The coordinate converter 9 uses the output pulse P of the periodic pulse generator 8 as a trigger and performs the calculation shown below on the inputs a and b based on the output θ of the differentiator 6, and as a result outputs c and d.
occurs.

c = acos θ - bsin θ d = asin θ + bcos θ The coordinate converter 9 can be easily constructed by combining an 8086 microprocessor and an 8087 numerical data processor manufactured by Intel Corporation, for example.

The outputs c and d of the coordinate converter 9 are respectively output from the pulse generator 1.
0-1.10-2. Pulse generator 10-1
．． 10-2 is triggered by the output pulse of the periodic pulse generator 8, and generates pulses Y', X for the number of output values of the coordinate converter 9.
' is output.

Figures 4(a) and 4(b) show the output pulses Y and X of sensors 3-1 and 3-2 and pulse generators 10-1 and 10-2.
The relationship between the output pulses Y' and X' and the waveform diagram are shown. The angle θ is 66 degrees.

According to the embodiment of the present invention described above, the rotation angle from the initial direction of the mouse is detected based on the difference in the amount of rotation of the two balls, and the value is used to determine the rotation angle of the mouse from the initial direction.
Since the mouse movement value in the direction is converted to the movement value in the X direction and Y direction at the coordinates of the initial mouse direction and output, the mouse position f is independent of the mouse rotation.
The amount of movement can be detected correctly.

〔Effect of the invention〕

According to the present invention, when using a mouse to move a data input position on the screen of a display device to a desired location, the amount of mouse movement is correctly calculated even if the mouse is rotated while moving. The user no longer needs to always point the mouse in a fixed direction, and the user can concentrate on tasks such as data input using the keyboard without being bothered by mouse operations. In addition, since the mouse can be tilted and used while fc, for example, even if the user is positioned diagonally to the display device, there is no longer a restriction of always pointing the mouse in the direction of the display, improving operability. .

[Brief explanation of drawings]

FIGS. 1(a) and (b) are schematic diagrams for explaining the operation of a conventional coordinate input device, and FIGS. 2(a) and (b) are external views of an embodiment of the coordinate input device according to the present invention. 3 is a block diagram showing the system of the embodiment according to the present invention, and FIGS. 4(a) and 4(b) are diagrams and signals explaining the relationship between the output pulses of the pulse generator. FIG. 2-1 to 2-2...Pole 3-1 to 3-3...Rotation sensor 4-1.4-2. 7-1.7-2...Counter 5.
...Reset pulse generator 8...Periodic pulse generator 6...Differentiator 9...Coordinate converter 10-1
．． 10-2...Pulse generator 11 Figure base thin line (Sosho 2 Figure (α) ヱ 3 Item l 4 Note (α))'

Claims (1)

[Claims] A box that moves freely on a horizontal plane, a first sphere that is placed below the box and rotates freely as the box moves, and an X of the box that is placed in contact with the first sphere. a first sensor that detects the amount of movement in the direction; a second sensor that is placed in contact with the first sphere and detects the amount of movement of the box in the Y direction; and a second sensor that is placed apart from the first ball in the Y direction. a second ball (or wheel) that rotates freely as the box moves; and a third sensor that is placed in contact with the second ball (or wheel) and detects the amount of movement of the box in the X direction. When the box moves while rotating, the output of the first sensor and the output of the third sensor are input, and from the difference between the two, the amount of rotation of the box is determined. The apparatus includes a detection means, and a conversion means for correcting the outputs of the first sensor and the second sensor based on the amount of rotation thereof, converting the output values into output values when the box moves without rotating, and outputting the output values. A display coordinate input device characterized by: