JPH0697430B2 - Coordinate point designating means and screen display device using the same - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a screen display device by a computer using coordinate point designating means such as a mouse or a trackball as an external input device so that it can also be used as screen scrolling means.

[0002]

2. Description of the Related Art In a screen display device using a computer such as a computer filing system and computer graphics, a coordinate point designating means using a mouse or a trackball as an external input device is used when selecting a file or instructing an operation mode. Often used.

For example, the screen display device shown in FIG.
It consists of a monitor 4 such as T and the computer body 5,
An external input device such as a mouse M or a trackball T
Is connected to the coordinate point designating means, and the coordinate point designating means performs file selection, operation mode designation, coordinate point designation, and the like.

[0004]

Since the mouse M, the trackball T, etc. are composed of a ball and a sensor for detecting the rotating direction of the ball, the mouse M and the trackball T can move in any direction on the monitor screen due to its structure. Can be instructed. That is, the structure is such that it can be moved to any position in the two-dimensional space.

In addition to designation of coordinate points by the mouse M alone, in order to achieve another function such as scrolling, the mode is changed or the display screen is scrolled while rotating the ball of the mouse M.

In the latter case, since the mouse M specifies the position in two dimensions, the ball can rotate in any direction of 360 °, so that the display screen on the screen 4 can be either vertically or horizontally. In the case of one-dimensional designation such as scrolling to the right, the screen scrolling in the horizontal direction or the vertical direction cannot be accurately controlled because the rotation direction of the ball is not regulated.

In particular, depending on the data content of the file displayed on the screen 4, the screen may be scrolled in only one direction. For example, if the horizontal (horizontal) data of the file currently stored in the memory is less than the horizontal data of the screen, the display screen may be scrolled horizontally. It doesn't make much sense. At this time, it is better to be able to scroll vertically (hereinafter referred to as vertical scroll). The reason is the same for horizontal scrolling (hereinafter referred to as horizontal scroll).

Therefore, the present invention has solved such a conventional problem, and uses a coordinate point designating means such that a coordinate point designating means such as a trackball or a mouse can be operated also as a scrolling means, and the coordinate point designating means is used. The proposed screen display device.

[0009]

In order to solve the above-mentioned problems, the coordinate point designating means according to the first invention is a ball which constitutes the coordinate point designating means for moving the coordinate point displayed on the screen. On the other hand, braking means for restricting the rotating direction of the ball only in the horizontal axis direction or the vertical axis direction are arranged on the horizontal axis and the vertical axis around the ball, respectively. The coordinate point designating means functions as a screen scrolling means.

In the screen display device according to the second aspect of the present invention, there are provided coordinate point designating means for moving the coordinate points displayed on the screen, a computer main body, a file memory, and a monitor. In the point indicating means, the braking means for restricting the rotating direction of the ball to only the horizontal axis direction or the vertical axis direction is arranged on the horizontal axis and the vertical axis around the ball. The operating state of the brake means is controlled from the data corresponding to the horizontal and vertical directions of the file and the size of the monitor, and when the brake means is activated, the coordinate point designating means functions as screen scroll means. It is characterized by what was done.

[0011]

As shown in FIG. 1, the coordinate point designating means 20 includes a ball 21, a coordinate point detection sensor 22 and 23 for detecting the rotation direction of the ball 21, and a pair of brakes arranged in the vertical axis direction. It comprises a means 24 and a pair of braking means 25 arranged in the horizontal axis direction.

In the screen display device 1 shown in FIG. 1, in the case of horizontal scrolling, a pair of brake means 24 are operated to hold the ball 21 from the vertical direction. Brake means 2
If 4 is configured to be rotatable in the horizontal axis direction (around the horizontal axis), the ball 21 rotates only in the horizontal axis direction, so that a horizontal scroll operation is performed. At this time, since the rotation of the ball in the vertical axis direction is restricted, the horizontal scrolling operation is ensured.

On the contrary, in the case of the vertical scroll, the pair of braking means 25 are operated to hold the ball 21 from the horizontal direction. If the braking means 25 is configured to be rotatable in the vertical axis direction, the ball 21 rotates only in the vertical axis direction, so that the vertical scrolling operation is performed. Also at this time, since the rotation of the ball 21 in the horizontal axis direction is restricted, the vertical scrolling operation is ensured.

Whether to use the vertical scroll or the horizontal scroll is automatically determined in consideration of the horizontal and vertical data of the file currently in use and the screen size of the monitor 4.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an example of the coordinate point designating means and the screen display device using the same according to the present invention will be described in detail with reference to the drawings.

FIG. 1 shows a coordinate point designating means 20 according to the present invention.
The outline of the screen display device 1 using is shown. Keyboard 2
The input data from is taken in by the CPU 11 in the control unit 10 provided in the computer main body, the data is analyzed, and the analysis result is displayed on the monitor 4. In this example, which functions as the coordinate point designating means 20, coordinate point data from the trackball 20 is fetched by the CPU 11 and displayed as a cursor K on the screen.

Reference numeral 12 is a memory (RAM) in which data of an image file and a document file is stored, and 13 is a braking means 24, 25 provided on the trackball 20.
It is a control unit for (details will be described later).

As shown in FIG. 2, the trackball 20 functioning as the coordinate point designating means according to the present invention is constructed as follows.

A pair of detection sensors 22 and 23 for detecting coordinate points are provided on the ball 2 for indicating a coordinate point.
In this example, it is attached in a direction inclined by about 45 ° with respect to the horizontal axis. The braking means 24, 25 are respectively pushers 24A, 25A and an operating portion 24 for them.
B and 25B.

Pressers 24A are arranged on the upper and lower sides of the ball 21 in the vertical axis direction with a predetermined gap therebetween. Actuator 2 for the pusher 24A
4B is provided, and the pressing member 24A presses the ball 21 and releases the ball 21 by controlling the operating portion 24B. H indicates the operation control signal.

Similarly, pushers 25A are arranged at predetermined positions on both the left and right sides in the horizontal axis direction, and actuating portions 25B for the pushers 25A are provided.
By controlling 5B, the pressing element 25A presses and releases the ball 21. V indicates the operation control signal.

The operation control signals H and V are supplied to the control unit 13
It is designed to be created by hardware, but CPU1
It can also be created as software by the internal processing of 1.

Since the operating parts 24B and 25B have the same structure, a specific example of only the operating part 25B will be described. FIG. 3A is a specific example of the operating unit 25B, and in this example, the electromagnetic solenoid 30 is used.

The electromagnetic solenoid 30 is a rotatable cylindrical body 3.
1 has a drive coil 32 wound around a bobbin (not shown) and the like, and an operating rod 33 of a predetermined length is arranged so as to penetrate the hollow portion of the drive coil 32. Then, the pusher 25A is attached to the tip portion thereof. As the presser member 25A, a molded product such as rubber or soft plastics can be used.

The tubular body 31 has a plurality of ball bearings 35.
It is also rotatably attached to the fixing means 34 which is also a tubular body via the above. The fixing means 34 is fixed to the trackball body (not shown).

The actuating rod 33 moves forward and backward based on the actuation control signal V supplied to the drive coil 32, and
As shown in FIG. 3B, the pusher 25A is pressed against the left and right peripheral surfaces of the ball 21 during operation, so that the rotation of the ball 21 in the virtual horizontal axis direction through the center of the ball 21 is restricted.

However, the electromagnetic solenoid 30 operates the operating rod 33.
Since it can freely rotate in the circumferential direction, the rotational movement of the ball 21 in the vertical axis direction is not restricted even when the pressing element 25A presses the left and right peripheral surfaces of the ball 21 as shown in FIG. 3B. Therefore, when the ball 21 is rotated in the vertical axis direction, the ball 21 rotates in that direction, and the electromagnetic solenoid 30 also rotates at the same time. Since the pair of actuating portions 25B are controlled simultaneously, the left and right pushers 24A are
Are simultaneously pressed and released at the same time.

Since the relationship between the pusher 24A and the operating portion 24B of the brake means 24 arranged in the vertical axis direction is the same as that in FIG. 3, only the rotation in the vertical axis direction is restricted when the brake means 24 is operated, and the horizontal direction is maintained. It can rotate freely in the axial direction.

Now, the braking means 2 for the ball 21
The operations of 4 and 25 are preferably controlled adaptively according to the data content of the file to be worked. As described above, since the image information based on the data of the image file or the document file stored in the RAM 12 is displayed on the monitor 4, the horizontal data and the vertical data of this file are monitored and each of them is monitored. It may be determined from the data whether the trackball 20 is controlled in the free mode or the scroll mode. A concrete example of how to control is shown in FIG.

It is assumed that the size of the file to be displayed on the screen is Dx and Dy as shown in FIG. 4B with respect to the size (horizontal Sx, vertical Sy) of the display surface of the screen as shown in FIG. 4A. When the file is an image file, the actual image data (for example, binary data) in addition to the width Dx (number of dots) and the length Dy (number of dots) forming the file
Is stored. In the case of a document file, the number of lines, the maximum number of characters in one line, and the actual document data are stored. Therefore, when the number of lines and the line spacing are multiplied, the length Dy of the size of the document file is obtained. By multiplying the number of characters by the size of the typeface, its width Dx is obtained.

The rotation direction of the ball 21 is adaptively controlled based on the relationship between the size of the screen and the amount of data of the file to be displayed on the screen, and the following four scroll modes are automatically selected.

(1) As shown in FIG. 4B, the file width data Dx and the file length Dy are both screen sizes Sx and Sy.
Greater than (Sx <Dx, Sy <Dy). In this case, since all the information of the file cannot be displayed on the screen at once, in this case, the scrolling direction by the trackball 20 is not restricted and the display area of the file can be freely shifted in any of the vertical and horizontal directions. It must be able to be displayed. To that end, as shown in FIG. 4C, the braking means 24, 2 for the ball 21
Both 5 need to be kept free. That is,
The operation control signal must be H = 0 and V = 0. (2) When the file is vertically longer than the screen size as shown in FIGS. 5A and 5B (Sx> Dx, Sy <D
y). In this case, the display screen need only be vertically scrolled. This is because there is no file data necessary for horizontal scrolling. Therefore, the braking means 25 operates so that the ball 21 can rotate only in the vertical axis direction as shown in FIG. Therefore, H = 0, V = 1
Is. (3) When the file is horizontally longer than the screen size as shown in FIGS. 6A and 6B (Sx <Dx, Sy> D
y). In this case, the display screen need only be horizontal and scroll. Therefore, the operating state of the braking means 24 is controlled so that the ball 21 can rotate only in the horizontal axis direction as shown in FIG. H = 1 and V = 0. (4) When the file size is smaller than the screen size as shown in FIGS. 7A and 7B (Sx> Dx, S)
y> Dy). In this case, scrolling is restricted because new information is not displayed on the screen even if scrolling is performed. That is, as shown in FIG. 6C, the braking means 24 and 25 operate together to lock the movement of the ball 21. Therefore, H = 1 and V = 1.

In order to realize these four scroll modes, the control programs shown in FIG. 8 and subsequent figures are stored in a program memory (not shown) associated with the CPU 11. FIG. 8 shows a control program for realizing the trackball operation and the scroll operation which are the basic operations of the present invention.

In FIG. 8, reference numeral 40 is a start-up processing program as an external input device, and 60 is an axis control program. The axis control program is a program provided to determine the above-mentioned four control modes (scroll modes). Reference numeral 70 denotes a ball brake program provided to realize brake control according to each scroll mode. It will be explained step by step.

FIG. 9 is a flowchart 4 for start-up processing.
8 shows a specific example, the program shown in FIG. 8 is started up in synchronism with power-on, and then the screen sizes Sx and Sy are read (step 4).
1, 42).

Next, when a load button (not shown) provided on the keyboard 2 is pressed, the existence of the file is judged (steps 43 and 44), and when the file is stored in the RAM 12, the file is stored. The type is checked. When the image file is an image file as in step 45, the width and the vertical length of the image file (Dx, D
y) and further reading of the image data is performed (steps 46 and 47).

If the file is a document file as in step 48, the number of lines in the file, the number of characters in one line, and the document data are read, and the horizontal width Dx and vertical length Dy of the file are calculated from these data. (Steps 49 and 50). By reading the above data, the execution of the initial program as the external input device ends.

FIG. 10 is a flow chart showing an example of the axis control program 60, and the scroll mode is determined from the data Sx, Sy, Dx, Dy read by the control program of FIG.

As shown in FIG. 10, when both the size discrimination conditions of steps 61 and 62 are satisfied, it is in the free state shown in FIG. 4, and at this time, the operation control signal is H = 0, V =
0 (step 63), the braking means 24,
25 is in the brake release state.

The condition of step 61 is satisfied, but step 6
When the condition of 2 is not satisfied, the file size is vertically longer than the screen size as shown in FIG. 5, so in this case, H = 0 and V = 1 are set and
The scroll mode is adopted (step 64).

If the condition of step 61 is not satisfied but the condition of step 65 is satisfied, in this case, since the file size is horizontally longer than the screen size as shown in FIG. 6, H = 1, V = 0. Is set to the horizontal scroll mode (step 66).

When neither the condition of step 61 nor the condition of step 65 is satisfied, the file size is smaller than the screen size as shown in FIG. 7. Therefore, in this case, H = 1 and V = When set to 1, the scroll mode is prohibited (step 67).

When the ball 21 is rotated when the scroll mode is automatically selected as described above from the size of the screen and the size of the file, scrolling of the screen is started in accordance with the rotating direction of the ball 21. ,
There is a possibility that it scrolls too much and a part of the display screen is lost.

For example, when the file size is vertically long as shown in FIGS. 11A and 11B, in order to display the uppermost end of the vertically vertical scrolling display screen S without omission,
The coordinate y must not exceed y = Wy = 0 as shown in FIG. That is, y = Wy must not be negative.

Similarly, in order to display the bottom end of the display screen S during vertical scrolling so as not to lack it, it must be smaller than y = Wy = Dy-h as shown in FIG. I have to. That is, y = Dy during scrolling
Do not take values greater than -h. Where h =
It is Sy.

When the display screen S scrolls to the uppermost end or the lowermost end or more, an appropriate brake is applied to the ball 21 to tactilely urge the operator to be overscrolling (scrolling excessive). You should do it. For that purpose, a pulse-like signal as shown in FIG.
4B to give an intermittent braking operation.

13A to 13D when the file size is horizontal, in this case, when the file is horizontally scrolled to the left, the left end portion of the display screen S is displayed as shown in FIG. By preventing the coordinate x from falling below x = Wx = 0, it is possible to prevent the display screen S from being partially lost.
When scrolling to the right, the coordinate x of the right edge of the display screen S
However, it is possible to prevent a partial omission of the display screen S by preventing x = Wx = Dx-w from being exceeded. Where w =
It is Sx.

Also in this case, if a pulse signal as shown in FIG. 14 is given to the actuating portion 24B as the actuation control signal V given to the braking means 25, the braking operation is intermittent with respect to the rotational operation in the horizontal axis direction. Since the ball 21 can be applied to the ball 21, the operator can recognize the scroll-over.

FIG. 15 shows a concrete flow chart 70 for achieving the brake control state based on such a display state.
And shown in FIG.

First, in FIG. 15, steps 71 and 7
In step 2, the size of the screen and the size of the file are discriminated, and when the conditions of steps 71 and 72 are cleared, respectively, it can be seen that the size relationship shown in FIG. In this case, no special processing is performed, and it is checked whether or not the scroll is stopped by another operation key or the like (step 73).
The scroll mode is canceled when the corresponding operation key is pressed.

Step 71 is satisfied but step 72
When the condition of is not satisfied, as shown in FIG.
Enters scroll mode. At this time, as shown in FIG. 11, the value Wy of the coordinate y on the y-axis (vertical axis) is monitored (step 74) and does not become Wy = 0 (condition for not missing the upper end of the display screen S) or less. It is checked whether or not Wy = Dy-h (condition for not missing the lower end of the display screen S) or more.

When these conditions are satisfied, the display screen S is displayed without omission. At this time, therefore, as shown in FIG. 5, H = 0 and V = 1 and the braking means 25 is constantly operated. Controlled to work (step 7)
5).

In this vertical scroll mode, the rotation state of the ball 21 is checked (step 7
6), changes in coordinate values due to rotation of the ball 21 Δx, Δ
y is detected and read by the position sensors 22 and 23 (step 77). The coordinate values of the new upper end and lower end of the display screen S are calculated in consideration of these changes Δx and Δy, and the larger upper limit value of (0, Wy + Δy) is selected, and the selected coordinate value Wy is selected. Is set to 0 or less as the upper scroll limit (step 78,
79, 74).

This means that when the coordinate value Wy becomes negative, the upper end of the display screen S is positioned further above the coordinate value y = 0, while the coordinate value y = 0 can be displayed on the screen. This is because the data between the negative value and 0 is not displayed on the screen because it is the limit of. This is because if the upper limit value is suppressed to 0, the upper end of the display screen S will not be displayed on the screen without being cut off.

Similarly, in step 74, a new lower end coordinate value of the scroll result is calculated, the value Wy is compared with the lower end limit value (Dy-h), and the smaller one is displayed on the display screen S. Is selected as the lower limit of. Then, when the selected lower limit value Wy reaches the lower limit value (Dy-h), this lower limit value is subsequently selected as the lower limit value of the display screen. As a result, the lower end of the display screen S will not be partially displayed and displayed.

As a result of scrolling, this upper limit value Wy = 0
Or when the lower limit value Wy = Dy-h (step 74), a pulse signal is used as the operation control signal H, and the braking means 24 operates intermittently in the vertical axis direction (step 80). . At this time,
The other operation control signal V remains "1". Such intermittent braking action in the vertical axis direction continues until a scroll stop command is input (step 7).
9).

In the horizontal / scroll mode, Sy
Since <Dy, the process proceeds from step 71 to the flowchart shown in FIG. Then, when Sx> Dy, the process is the same as in FIG. 7 and the scroll stop command is issued to exit the scroll mode (steps 81 and 82).

However, if Sx <Dx, then
In the scroll mode, in this case as well, 0 is set as the left end limit value Wx of the display screen S, (Dx-w) is set as the right end limit value Wx, and the braking means 24 provided in the vertical axis direction with H = 1. Is controlled to the ON state (steps 84 and 85).

While the ball 21 is rotated and scrolled, the left end value Wx is added by taking into account the coordinate values Δx and Δy at that time.
Is selected as the larger one of (0, Wx + Δx), and the smaller one of (Wx, Dx-w) is selected as the right end value Wx (steps 86, 87, 88). This processing eliminates a part of the display screen S.

When the selected left end value Wx reaches the left end limit value 0, scrolling to the left is no longer possible. At this time, therefore, a pulse signal is given as the operation control signal V and the ball in the horizontal axis direction is supplied. An intermittent brake is applied to the rotation (step 90). Similarly, when the selected right end value Wx reaches the right end limit value (Dx-w), scrolling to the right is no longer a limit, and at this time also, a pulse signal is given as the operation control signal V and the horizontal direction is applied. Intermittent braking is applied to the ball rotation in the axial direction (step 90).

In addition to the function as a trackball, the above-mentioned trackball 20 is configured to automatically calculate the scroll mode from the size of the screen and the size of the read file and perform the corresponding braking process. However, as shown in FIG. 17, an operation button 83 is provided on one side surface of the trackball main body 82, and the non-operation state functions as a trackball (mouse), that is, as coordinate point designating means. It can also be configured to function as an operation means for scrolling.

At this time, a display portion 85 having the characters "scroll", for example, is provided on a part of the trackball main body 82,
When the display section 85 is turned on as shown in FIG. 17B when the operation button 83 is operated, the operation state of the operation button 83 can be visually confirmed easily. 87 is a well-known click button when used as a trackball.

FIG. 18 shows the basic operation of the control program when such a trackball 20 is used. Figure 8
Although the description of the same parts as those in FIG. 3 will be omitted, when the start-up processing program 40 is started, the operation state of the operation button 83 is checked (step 93), and when this is operated, that is, when B = 1, as described above. Control programs 60 and 70 'are selected to perform the scrolling process. The control program 60 for axis control is the same as in FIG.

Control program 70 'for ball brake
Is a function for checking the operation state of the operation button 83 as shown in FIGS. 19 and 20 and determining whether or not the scroll mode is selected (steps 95 and 96).
The processing steps are exactly the same as those in FIG. 11 and FIG. 12 except that is added. Therefore, the description is omitted.

Returning to FIG. 18, when B = 0, that is, when the operation button 83 is not operated, the normal trackball operation is performed. At that time, the control program for processing the cursor position in step 100 is started. The control program is terminated by operating the end key (step 94).

FIG. 21 is a flow chart showing an example of the control program 100 described above.
Both 4 and 25 are controlled to the open state (step 10).
1). After that, it is checked whether or not the trackball 21 has moved (step 102). When the trackball 21 has moved, the change amounts Δx, Δy and the value of B at that time are read, and a new cursor position (Mx, My) on the screen is read. Is calculated (steps 103 and 104).

Since it is desirable that the cursor position is always within the screen of the screen, the left end limit value 0 of the screen and the current cursor position Mx are set with respect to the horizontal x-axis so that the cursor does not protrude from the screen. Is selected, and when the current cursor position Mx exceeds the left end limit value 0, this left end limit value 0 is selected (step 1
05).

Similarly, the right end limit value Sx of the screen (screen) with respect to the x-axis is compared with the current cursor position Mx, the smaller value is selected, and when the current cursor position Mx exceeds the right end limit value Sx. The lower limit value Sx is selected (step 105).

Similar cursor position selection processing is performed for the y-axis, which is the vertical axis (step 106). As a result of both selection processing, even if coordinates other than the screen are designated by the rotation of the ball 21. , The cursor can always be displayed on the screen.

Keyboard 2 as shown in step 107
When the stop command for the coordinate point designating operation by the trackball is issued from, the cursor position control processing ends. The same applies when the ball 21 is not turned or when the operation button 83 is operated to set B = 1 (step 10).
2, 108).

When performing the drawing process using the trackball 20 shown in FIG. 17, the drawing mode (drawing line) in the drawing mode designation area of the drawing screen displayed on the screen as shown in FIG. Is selected by the cursor K, and the designated line is drawn in the drawing area.

In this drawing mode, a person who can draw between two points like a rubber band with a designated line type according to the movement of the cursor K from one point designated by the cursor K until the next point is designated. Is convenient.

FIG. 23 shows an example of a basic control program for performing this drawing process. In this case, in the trackball mode and when the click button 87 (FIG. 17) is pressed (steps 111 and 112), the drawing mode control program (the line type designation control program 120 and the control for determining the cursor K coordinate). The program 130) is activated, and the drawing mode is ended by operating the end key (step 113).

An example of the line type designation control program 120 is shown in FIG. When the vertical line is designated as the line type (step 121), it is sufficient for the drawing operation if the ball 21 moves only in the vertical direction. Therefore, at this time, in order to achieve the same state as the vertical scroll shown in FIG. 5, H = 0 and V = 1 are controlled, and only the braking means 25 is activated (step 122).

When the horizontal line is designated in step 123, H = 1 and V = 0 are set in order to achieve the same state as the horizontal scroll as in FIG. 6, and only the braking means 24 is controlled to the operating state ( Step 124).

When neither the vertical line nor the horizontal line but the free line is designated, the state of FIG. 4 is realized by controlling H = 0 and V = 0 so that the rotation direction of the ball 21 is in the free state. (Step 125).

When the line type is designated, the process moves to the cursor position confirmation process. At this time, even if the two points for the line drawing are not fixed, the lines are drawn like a rubber band by catching the two points where the cursor K moves as if they were fixed momentarily.

It is assumed that the first point p after the line type is designated as shown in FIG. 25 has already been determined. Then cursor K
Is moved to the point q, the line L1 between the points pq is tentatively determined and line drawing is performed. When the cursor K moves to the point r at the next time, the line L1 is erased ( Instead, the screen is cleaned, and instead, the line interval L2 between the points pr is pseudo-determined and the line drawing is performed. By alternately erasing the lines and drawing the lines at high speed, it is possible to realize a state equivalent to drawing with a rubber band up to the fixed point n.

FIG. 26 shows a concrete example of the control program 130 for realizing this. In order to perform continuous line drawing and erasing, first the coordinates (x1, y
At the same time that 1) and (x2, y2) are read, the process of deleting the line drawing given by the immediately preceding coordinates, that is, the process of cleaning the screen, and the line drawing by the new coordinates are performed (steps 131 and 132). This series of processing is performed until the other coordinate is determined.

When the other coordinate is confirmed, click button 8
Since 7 is pressed and c = 1 is set (step 133), the change value (Δx, Δy) of the cursor position is read at this time, new coordinates (Mx, My) are calculated, and the calculation result is The determined coordinate values are x2 and y2 (step 1
34,135,138).

Steps 136 and 137 are processing for keeping the cursor K out of the screen as described above, and therefore description thereof will be omitted. Coordinate value x2,
When y2 is confirmed, the next line drawing process and the screen erasing process preceding it are performed again (step 13).
9). If the operation button 87 is pressed during this processing, the coordinate confirmation processing ends (step 140).

A mouse may be used as the coordinate point designating means 20. The configuration of FIG. 17 is merely an example. Coordinate point designating means 2
0 is also applicable to those provided in the keyboard 2.

[0083]

As described above, in the coordinate point designating means according to the present invention, the braking means for restricting the rotating direction of the ball only in the horizontal direction or the vertical direction is provided on the horizontal axis and the vertical axis around the ball. The coordinate point designating means functions as screen scrolling means when the brake means is activated.

Further, in the screen display device according to the present invention, the scroll mode can be automatically selected from the size of the screen and the size of the file to be read when the screen display is realized by using the coordinate designating means. is there.

According to this, the trackball can be used also for scrolling, and in this case, the vertical scroll can be restricted in one direction so that the ball rotates only in the vertical direction, which is very convenient.

Since a part of the file display screen is not missing from the screen screen, it does not take too much time to scroll again in the opposite direction.

Since the cursor K is controlled so that it is always in the screen of the screen, the cursor K does not disappear from the screen even if the coordinate indicating means is excessively moved, and the cursor K is returned to the screen. There is no need for reverse processing of.

In order not to lack a part of the file display screen from the screen screen, the ball for cursor movement was adapted to be intermittently braked adaptively, so the ball was excessively moved. It has a feature that it becomes tactilely recognizable and excessive ball operation can be prevented.

[Brief description of drawings]

FIG. 1 is a system diagram of essential parts showing an example of a screen display device according to the present invention.

FIG. 2 is a configuration diagram of a main part showing an example of a coordinate designating means.

FIG. 3 is a cross-sectional view showing a specific example of braking means.

FIG. 4 is a view showing a ball in a free state.

FIG. 5 is an explanatory diagram of vertical scrolling.

FIG. 6 is an explanatory diagram at the time of horizontal scrolling.

FIG. 7 is an explanatory diagram when scrolling is prohibited.

FIG. 8 is a configuration diagram of a basic control program for controlling a trackball.

FIG. 9 is a diagram showing an example of a flowchart for startup processing.

FIG. 10 is a diagram showing an example of a flowchart for axis control.

FIG. 11 is an explanatory diagram of a braking operation during vertical scrolling.

FIG. 12 is a waveform diagram of an operation control signal H used at that time.

FIG. 13 is an explanatory diagram of a brake operation at the time of horizontal scrolling.

FIG. 14 is a waveform diagram of an operation control signal V used at that time.

FIG. 15 is a diagram of a flowchart for ball braking.

FIG. 16 is a flow chart diagram for a ball brake.

FIG. 17 is an explanatory diagram of a trackball and scroll selection key.

FIG. 18 is a diagram of a ball control flowchart when a track ball and a scroll selection function are added.

FIG. 19 is a diagram of a flowchart for ball braking at that time.

FIG. 20 is a diagram of a flowchart for ball braking at that time.

FIG. 21 is a flow chart for cursor position control.

FIG. 22 is an explanatory diagram of a drawing mode selection operation.

FIG. 23 is a flowchart when using a click key.

FIG. 24 is a diagram of a flow chart for designating a line type.

FIG. 25 is an explanatory diagram of an operation of continuous drawing.

FIG. 26 is a diagram of a flowchart for determining cursor coordinates.

FIG. 27 is a diagram of a conventional screen display device.

[Explanation of symbols]

 1 Screen Display Device 2 Keyboard 4 Monitor 10 Control Unit 11 CPU 12 Data RAM 13 Control Unit 20 Trackball 21 Ball 22, 23 Position Detection Sensor 24, 25 Brake Means 24A, 25A Presser 24B, 25B Actuator 83 Operation Button 87 Click button

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Internal reference number FI Technical display location G06F 3/14 360 D 7165-5B 7165-5B G06F 3/14 360 D

Claims (8)

[Claims] 1. Brake means for restricting a rotating direction of a ball to only a horizontal axis direction or a vertical axis direction with respect to a ball which constitutes a coordinate point indicating means for moving a coordinate point displayed on a screen. Are arranged on the horizontal axis and the vertical axis around the ball, respectively, and when the braking means is operated, the coordinate point designating means functions as screen scroll means. . 2. The coordinate point designating means according to claim 1, wherein the coordinate point designating means is a mouse or a trackball. 3. A coordinate point designating means for moving a coordinate point displayed on a screen, a computer main body,
The coordinate point designating means is composed of a file memory and a monitor, and the coordinate point designating means is a braking means for restricting the rotation direction of the ball to only the horizontal axis direction or the vertical axis direction with respect to the ball forming the ball point. It is arranged on each of the horizontal and vertical axes on the periphery, and the operating state of the braking means is controlled from the data corresponding to the horizontal and vertical directions of the file and the size of the monitor. A screen display device, wherein the coordinate point designating means functions as screen scrolling means. 4. The coordinate point designating means is controlled based on the size of the screen and the amount of data in the file, and the coordinate point designating means functions as coordinate point designating, horizontal scrolling and vertical scrolling. The screen display device according to claim 2. 5. The screen display device according to claim 3, wherein during horizontal scrolling, a braking means arranged on the vertical axis is operated to regulate vertical rotation of the ball. 6. The screen display device according to claim 3, wherein in vertical scrolling, a braking means arranged on the horizontal axis is operated to restrict horizontal rotation of the ball. 7. The screen according to claim 3, wherein the brake means is controlled to operate intermittently in a scroll control state in which a part of the display screen comes off the screen of the monitor. Display device. 8. A coordinate limit to be read for the screen display so as to monitor the coordinate value of the display screen and prevent the display screen from being displaced from the screen when scrolling out of the coordinate value on the screen is performed. The screen display device according to claim 3, wherein the value is regulated.