JPH0380296A - How to enlarge the screen of an image display device - Google Patents

Abstract

PURPOSE:To easily enlarge a screen and to easily specify an enlarged area by performing an enclosure operation by an input pen in an area where enlarged display is desired. CONSTITUTION:A digitizer 1 is placed on the upper surface of a liquid crystal display unit 2 to constitute a handwriting plotting input part. By operating the electromagnetic input pen 3, the information on the operating position of the pen 3 is fetched in a control part 4 through an X axis input port 5 and a Y axis input port 6. The control part 4 stores the continuous locus of the X axis and Y axis information, which is fetched, as image data, which is given to a display unit 2 through an X axis display driving part 7 and a Y axis display driving part 8 to be displayed on the screen. When an operator performs the enclosure operation in the area which should be enlarged to be displayed by the input pen 3, the maximum value and the minimum value of the X axis and those of the Y axis in the corresponding locus are extracted respectively, and the range is enlarged to the image within the range of the coordinates specified by the maximum values and the minimum values. Thus, the range which should be enlarged is easily specified while viewing the screen.

Description

DETAILED DESCRIPTION OF THE INVENTION (A) Field of Industrial Application The present invention relates to a method for enlarging the screen of an image display device used, for example, in a CAD system, handwriting input system, or the like.

(b) Conventional technology In general, in image display devices used in handwriting input systems, etc., when enlarging the screen, the method of specifying the enlargement area is to assume that the area of the screen to be enlarged is a rectangle, and to When the magnification rate is one step, specifying the center of the enlarged area with the input pen, and if there is sufficient hardware, stepless enlargement is possible. There are also known devices that have high speed and enable zooming.

<C) Problems to be Solved by the Invention Among the conventional methods of specifying the enlargement area in screen enlargement described above, the method of specifying the area to be enlarged by diagonal points is a method that encloses the required area with a rectangle, but only the diagonal points are used. There is also the problem that it requires getting used to specifying the input pen, and requires the operation of touching two points with the input pen.Although the center enlargement method only requires one operation, there are multiple levels of enlargement. However, the zoom method usually enlarges the screen from the center of the screen, which requires the screen display position to be moved in advance.

The present invention has focused on the above-mentioned problems, and aims to provide a method for enlarging the screen of an enlarging display device in which the enlarged area can be specified with a simple operation and without the need for special training. There is.

(d) Means and Effects for Solving the Problems The method for enlarging the screen of an image display device according to the present invention includes an input pen, a handwritten information input means that captures a trajectory caused by contact with the input pen as handwritten information, and a handwritten information input device that stores handwritten information and information. A method for enlarging a screen of an image display device including a two-dimensional display means for displaying a displayed image, the method comprising: specifying an enlarged range of the screen displayed on the two-dimensional display means by an enclosing operation of the input pen; Extract and store the maximum and minimum values of the X-axis and the maximum and minimum values of the Y-axis of handwritten information input by , and create an image surrounded by these maximum and minimum values of the The screen is enlarged until the screen is displayed.

In this screen enlargement method, by enclosing the area to be enlarged by the operator using an input pen, the maximum and minimum values of the X-axis of the trajectory corresponding to the enclosing operation,
The maximum and minimum values of the Y-axis are extracted, respectively, and the image is enlarged to within the coordinate range specified by the maximum and minimum values of the X- and Y-axes, so the operator can perform special enlargement. You can easily specify the range to be enlarged while looking at the screen without having to be particularly careful when specifying the range.

(E) Examples The present invention will be explained in more detail with reference to Examples below.

FIG. 2 is a schematic block diagram of a handwriting input system in which the present invention is implemented. In the figure, a digitizer 1 is placed on the top surface of a liquid crystal display 2 to constitute a handwriting drawing input section, and the digitizer 1 has a plurality of transparent conductive electrodes,
In other words, they are arranged in a matrix on the X-axis and Y-axis, and by operating the electromagnetic input pen 3, the operation position information is taken into the control unit 4 via the X-axis input port 5 and the Y-input capotro. It looks like this. The control unit 4 stores the continuous trajectory of the captured X-axis and Y-axis information as image data, and displays the stored image data on the liquid crystal display via the X-axis display drive unit 7 and the Y-axis display drive unit 8. 2 and is configured to be displayed on the screen.

The control unit 4 also has a function of storing image data input from a document input/reading unit (not shown), and in addition to handwritten input information, image information of the read document is also displayed on the liquid crystal display 2. configured to be displayed.

Although the configuration of the input section itself of the handwriting input system shown here is not particularly distinctive, when the handwriting input system of this embodiment enlarges the screen, the input pen 3 encloses the area to be enlarged. By doing so, the screen is enlarged based on the maximum and minimum values of the X-axis and Y-axis within the enclosed range.

For example, in the display screen of screen a shown in FIG. 1(A),
If you want to enclose and enlarge image data 1.2.3, break input pen 3! By enclosing as Isb, as shown in Fig. 1 (B), the maximum value of the X axis X ms*, the minimum value of the X axis XmLn, and the maximum value of the Y axis y□8 for the dashed line locus Extract and store the minimum value V mLn of the Y-axis and the Y-axis, and extract and store these X IIIX%
, l and VIIIX%)'+air+, the image enclosed within the coordinates can be enlarged and displayed as shown in FIG. 1(C).

Next, the enlargement processing operation of the pen input system of the above embodiment will be explained with reference to the flowchart shown in FIG.

When the enlarged screen mode is specified, it is first determined whether the pen is down [step ST (hereinafter simply referred to as ST) 1
]. When the electromagnetic input pen 3 comes into contact with the surface of the digitizer 1 and a pen down signal from the electromagnetic input pen 3 is input to the control unit 4, the determination is YES, and the trajectory of the electromagnetic input pen 3 causes the state shown in FIG. As shown in A), when the enclosing operation is performed, following the movement of the electromagnetic input pen 3, the pen position Xt,'! 5 are respectively read and stored (ST2). And read the X coordinate X,
is larger than XMIIK (Sr3
), here, Xm*x % Xs+in , )'lI
The initial values of mx sy6.7 are O, and initially, X.

Since is large, this determination becomes YES, and the next captured Xi is stored as x + *mx. However, after importing the first coordinate X, the maximum value until the previous time
□8, and if it is larger, the current Xi is stored as the new maximum value X□ (Sr1);
If it is less than 8, skip Sr1, then
This time, it is determined whether this coordinate Xi is smaller than Xff1in (5T5), and if it is smaller, the current Xi is updated and stored as the minimum value X0.7 (ST6),
If the current Xi is not smaller than mtn, Sr6
Skip. Similarly, for the coordinate yt, y□8
5T7), and if so, the '! + as a new ymmx (S
If the current yi is smaller than r8), y I remember (STIO), but if it is not small here,
5TIO will be skipped.

As described above, while the enclosing operation is continued using the handwriting pen, X□ and Xsi*y□ are respectively executed. ,y
Xi, )'i, which is updating and memorizing Ll and Ll and moving at the same time.
Display the enclosed area with dotted lines for the coordinates of (STII
). This dotted line display allows the operator to roughly grasp the screen range that he or she is currently trying to enlarge.

It is determined in 5T12 whether or not the pen is up, and while the enclosure operation continues, the pen is not up.
The above processing from Sr1 to 5T12 is continued. When the pen is up, the determination of 5TI2 becomes YES, and then X11m is extracted as described above. ,X*in
,)'sag %)'m1ri range - A,B specifying 1.2.3 in Figure 1(B)
, C, and D are enlarged and displayed as shown in FIG. 1(C).

(f) Effects of the Invention According to the present invention, the screen can be easily enlarged by enclosing the input pen in the area desired for enlarged display.In other words, it is possible to specify a two-dimensional display area by inputting one stroke. This makes it possible to specify an enlarged area much more easily than in the past. Coupled with the usability of the input pen-type data input device, it has the advantage that the user's movements are natural and easy to learn.

[Brief explanation of drawings]

FIG. 1(A), FIG. 1(B), and FIG. 1(C) are explanatory diagrams for explaining the screen enlargement method of the present invention, and FIG.
FIG. 3, which is a schematic diagram of the input section of the handwriting input system in which the present invention is implemented, is a flow diagram for explaining a screen enlargement method of the square plane input system. 1: Digitizer, 2: Liquid crystal display, 3: Electromagnetic input pen, 4: Control unit, 5: X-axis input boat, 6: Y-axis input boat, 7: X-axis display drive unit, 8: Y-axis display drive unit . Figure (C) Figure 2 Figure

Claims (1)

[Claims] (1) A method for enlarging the screen of an image display device including an input pen, a handwritten information input means for capturing a trajectory caused by contact with the input pen as handwritten information, and a two-dimensional display means for displaying handwritten information and stored images. and specifying the enlarged range of the screen displayed on the two-dimensional display means by enclosing the input pen, and determining the maximum and minimum values of the X-axis and Y-axis of handwritten information input by this enclosing operation.
An image characterized in that the maximum and minimum values of the axes are extracted and stored, and the screen is enlarged and displayed to the image surrounded by the maximum and minimum values of the X-axis and the maximum and minimum values of the Y-axis. How to enlarge the screen of a display device.