JPH02176698A - Display device - Google Patents

Abstract

PURPOSE:To improve the man-machine of an entire system by providing a memory where boundary coordinates in the section of the same magnification are stored and a means for reducing and enlarging the display information of sampling data and displaying so that plural areas having different enlarging factors exist on the same display screen. CONSTITUTION:A data processing device 10 arithmetically processes the data from a data collecting device, converts it into the display data and gives it to a display memory 16. In order to display one part of the area displayed on a displaying medium 20 which is reduced or enlarged as compared with other part, a means 3 for specifying the position on one part of the displayed area and a means 11 for processing the reduction or enlargement of the display information of the inputted data corresponding to one part thereof are provided so as to perform the display where the areas having the different enlarging factors are mingled on the same display screen. Thus, an operator who monitors the screen can monitor the content of the change of a detail display part in a real time while grasping the entire trend of the change.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a display device that displays data corresponding to input data, such as data sampled at regular intervals such as a trend graph. The present invention relates to a display device having an editing function that allows a plurality of partial data reduction and/or enlargement areas to be displayed in a mixed display area.

[Conventional technology]

Some conventional display devices, as described in Japanese Patent Laid-Open No. 61-290485, expand a partially enlarged area to the entire graph area, but it is not possible to display a mixture of reduced and/or enlarged areas. Furthermore, the data was discontinuous between the enlarged area and the non-enlarged area.

[Problem to be solved by the invention]

” 1. The conventional technology simply reduces or expands a certain area of the graph to the entire area of the graph for the purpose of making the graph easier to read, and the data of the noteworthy part that has been reduced or expanded is displayed as a whole. There were problems such as the operator not being able to obtain multiple pieces of data organized from a single graph because no consideration was given to the display/editing function, such as the relationship between the graph and the pig.

An object of the present invention is to provide a display device that can increase the density of displayed information in a form that is easy for an operator to understand by providing an editing function to a trend graph, thereby improving the man-machine performance of the entire system.

[Means to solve the problem]

The purpose of item 1 is to store the boundary coordinates of the same magnification section corresponding to the device, which is composed of a memory that stores display information corresponding to sampling data over a certain period of time, an arithmetic device that transfers data and performs calculations, and a display medium. This is achieved by a display device that is equipped with a memory and a means for reducing or enlarging display information of sampling data for each same magnification section, and displays a plurality of areas with different enlargement factors within the same display screen, and 1. means for displaying ruled lines corresponding to changes in range due to partial reduction/enlargement; means for displaying scales corresponding to changes in range due to partial reduction/enlargement; means for looper function for said partial reduction/enlargement; This is achieved by a display device equipped with a means for scrolling the enlargement function, a means for displaying a background color for each of the same magnification sections, and the like.

[Effect]

The above display device manages the trend graph display area in blocks of the same magnification section corresponding to the combination of x and y force direction magnifications independently of the trend graph information of the sampling data, and displays the trend line etc. using the magnification of each block. By doing this based on information, it is possible to display partial reductions and enlargements of trend graphs on the same graph, and display of ruled lines and scales accompanying partial reductions and enlargements.

Looper function, scroll function, background color display, etc. can be realized.

〔Example〕

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

FIG. 1A is a block diagram showing an embodiment of the display device according to the present invention, in which input data to be displayed on the display section is supplied from a plant.

In the present invention, the data displayed on the display unit may be of any type as long as it is graph data, and here, as an example, data sampled at regular intervals,
For example, the display of trend graph data will be explained. In the figure, 1 is a plant, and input data to be displayed is given to the data collection device 2 via an input/output (Ilo) interface 9. The data collection device 2 is
For example, keyboard 3. It has an arithmetic unit 5, a memory 6 for trend data, and an input data management unit 7 for display. The sensor unit 4 is provided in the plant 1 and outputs input data to be displayed, such as temperature, water pressure, etc., sampled at regular intervals, to the I10 interface. The keyboard 3 is operated by the operator to input the input data to be displayed, the display magnification of the input data in each display section, and to specify the trend graph display area for the display screen, 2 specify the display section, 2 specify the display color. etc. and provides the data to the arithmetic unit 5.

The calculation unit 5 is connected to the sensor unit 4. Data is taken in from the keyboard 1-3 or the plant 1, and necessary portions of the data are processed according to instructions from the keyboard and provided to the memory 6 and unit 7.

The trend data memory 6 stores input data (trend data) given from the arithmetic unit. The display input data management unit 7 has information for managing the range of data to be sent to the data processing device 10 out of the input data stored in the memory 6. Based on this information, for example, the input data in the memory 6 is It is also possible to send each sampling data one by one and display it on the screen one by one.
Alternatively, a certain range of input data in the memory 6 may be sent all at once, and a graph may be displayed all at once. The information in the unit 7 may be preset or may be set using the keyboard 3.

The data processing device 10 performs arithmetic processing on the data from the data collection device 2, converts it into display data, and displays the data in the display memory 1.
6, and the microprocessing unit l
-(MPU)11. Display 1 to rend data memory]
-22 Display management data memory 13. Random access memory]5. Read-only memory 16. Drawing units 1
~14.

MPU], ]- performs arithmetic (i.e., enlargement and/or reduction) processing and coordinate conversion processing on the input trend data in the memory 12 based on the data in the memory 13, converts it into display data, and stores it in the trend data memory 12. Then, among the stored display data, data to be displayed is sequentially given to the drawing unit 14.

Here, the data in the memory 13 may be preset, and the data in the keyboard 3. It may be given from Plan I-1. The drawing unit develops display data into pixel information and provides it to the display memory 18.

A display memory 18 generates a display pattern from pixel information and displays a display unit 20, such as a cathode ray tube (CRT).

A liquid crystal display, etc. is applied to display the 1-rend graph in the display area of the display screen of the display unit.

The two calculation units 1 to 5 have an MPU, an RLM, and a RAM, and the display unit 2o is X.

A recording device such as a Y plotter may also be used.

FIG. 1B is a diagram showing details of the display management data memory 13, which includes an enlarged section management table 41 and an enlarged section attribute table 45.

FIG. 2 is a diagram showing the relationship between the data displayed on the display unit 2o of FIG. 1 and the contents of the memory 12.

In this embodiment, a case will be described in which data values are updated in the horizontal direction (X direction) in the figure, but the present invention is also applicable to cases in which data values are updated in the X direction.

In FIG. 2, a trend graph display area 22 is displayed on the display screen 2 of the display unit 1-20.

Trend 1 to line 25 in trend graph display area 22
is displayed based on the contents of the display trend data memory 12 prepared by the data processing device 1o. The display trend data memory has, for example, data values (y-direction displacement value Δy) for each sampling point. Specifically, the display read pointer 26 in the display management data memory 13
By specifying the display readout area pointer 27, the display area in the display trend data memory] 2 is determined, and the X-direction update value ΔX of the entire trend line 25 and the X-direction displacement value for each point (sampling unit) are determined. 24 (Δy) and the coordinate values of one display point are sequentially calculated based on the data in the memory 12, and one trend line 25 as a collection of these display points is displayed. Preferably, a trend graph is displayed by combining a plurality of nine trend lines. The pointers 26 and 27 are set as the enlarged section attribute table 45 in the memory 13. The display read pointer 26 indicates the address of the drawing start point displayed in the area 22 of the display data in the display trend data memory 12, that is, the data to start reading. It corresponds to the X-direction coordinate of .

On the other hand, the display readout section pointer 27 indicates the section of data displayed in the area 22, that is, the address width.

Here, the data in the memory 12 stores data of a width necessary for the looper out of the input data in the memory 6. An updated value ΔX in the X direction corresponding to the input data sampling time Δt is also set as a table 28 in the table 45.

The data in the memory 12 is an updated value Δy in the X direction corresponding to an updated value for each sampling point of input data.

FIG. 3 is an example of a trend graph display of the display unit of FIG. 1 (FIG. 2). This trend graph display area 22
A trend graph consisting of a plurality of nine trend lines 25, ruled lines 31, and a scale is displayed.

FIG. 4 is a diagram showing the relationship between partial reduction/enlargement display in the display area of the screen and the management table. In FIG. 4, 1-
Corresponding to the trend graph display area 22, a display head management table 46. X-direction partial contraction/Jl expansion management table 42
and the y-direction partial reduction/enlargement management table 43 are prepared as the enlarged section management table 4 in the display management data memory 13, and the trend graph display area 22 (Fig. 3) is viewed based on these information. is the 1-rend graph display area 22 in FIG. 4, and 8 to r in FIG.

are blocks of sections divided by corresponding enlargement coefficients, and all areas within each section have the same magnification (enlargement coefficient) in the Xr'J direction.

The contents of the display area management table 46 are for setting the boundary coordinate values of the display area 22 on the display screen 21, and in the example of FIG. 4, the boundary coordinate values Xa + X a''4;ya, ya
Set +3.

This area 22 can be set anywhere on the screen 21, and a plurality of areas 22 can be set, but for the sake of simplicity, the case of - will be described here.

One unit of information content 44 in each of the reduction/enlargement management tables 4.2 and 4.3 is display section information composed of a section end coordinate S and an enlargement coefficient a.

In the table 42, the ward rIIj#end coordinates are the coordinates of the section boundary in the X direction (boundary coordinates), for example, X a+1. X a+
2..., and in the table 43, the coordinates of the section boundary in the X direction (boundary coordinates), for example, y total 1 + Y &"2+'
/a"8.... This defines a plurality of sections, and the entire area in each section has the same magnification.

In the example shown in the figure, the magnification in the X direction for sections A, E, and L is al, the magnification in the X direction for sections B, F, and J is a8, and the magnification in the X direction for sections I, J
, the magnification of L in the X direction is ao.

The magnification in the X direction of sections E, F, G, and H is a2.

In addition, when displaying data sampled at regular time intervals of the trend graph ate, sections in the X direction perpendicular to the time direction and the erY+X direction, for example, sections A, , E.

(2) is the magnification a1 in the X direction.

Using this information, the enlargement coefficient a is managed separately for each section of the same magnification in the x and y directions. The feature of the management concept of this embodiment is that the trend line 25 itself has an increment of ΔX and Δ for each display point.
The difference is that the enlargement coefficient a for performing partial reduction/enlargement is defined by the position on the display, whereas it is defined by y.

The enlarged section attribute table 45 in FIG. 1B further includes a background color management table 47, which stores information on the background color in each section A-L of the area 22.

According to this information, the background color can be displayed for each section.

Furthermore, by changing the section end coordinates shown in FIG. 4, it is possible to perform scrolling in which the position of the same magnification section changes.

Next, the process of drawing a trend graph by the data processing device 10 in this embodiment will be explained using flowchart 1 to FIG. 5. This process is executed by a program in the ROM 16.

Based on the management concept of partial reduction/enlargement shown in FIG. 1, the logic for actually drawing within the area of partial reduction/enlargement will be explained with reference to FIG.

First, in block 601, the drawing point is set to the coordinates (Xs,
ys). In block 602, the coordinate (X s
+ Y S ) is shown in Tables 4.2 and 4.
．． 3, read the X-direction expansion coefficient ax of the corresponding section from the table 42, and calculate the X-axis value Xs+1 of the next sampling point by l- corresponding to one sampling time Δt.
88 times the lend line X direction increment ΔX (a xHΔX
) to obtain (Xs+1=xs+axXΔX).

Similarly, in block 603, the y-coordinate value ys+1 of the next sampling point is read out from the memory 12, and the y-direction displacement Δy
Increase by ay times (a, Δy) and get 3/s+t=
Obtained as ys+a y・Δy.

In the next block 604, a line is drawn to Niza Ift (xs+1.ys+t), which is the end point of one drawn line calculated above, as long as the new coordinates are in the same section as the coordinates of the starting point. Whether or not they are in the same section is checked by referring to the end coordinates S in the tables 42 and 43. Also, when the new coordinates (end point) are outside the same section, the line drawing point is stopped on the boundary of the corresponding section, and in the next block 608 or 610, the first point (XS + 11 ys"t) of the new road point in the new section is determined. Wait for the coordinates to be calculated.The drawing logic when spanning an interval will be explained later in FIG. 6B.The next block 60
In block 5, it is determined whether the end point coordinate Xs+1 is outside the interval, and if it is within the interval, it is determined in block 606 whether the end point coordinate y3+1 is outside the interval, and in block 607, the end point coordinate 'Js+1 is also outside the trend graph display area 22. If it is outside the area, the process ends. If it is within the area, the first drawing point coordinates y5+1 in the new section are calculated in the next block 608, and at this time, the data read from the X-direction reduction/enlargement management table 43 is updated in accordance with the new section. Next, the process advances to block 604 and one drawing portion within the new section is drawn.

Furthermore, if it is determined in block 605 that x8+1 is outside the interval, it is determined in block 609 whether the end coordinate Xs''l is between 1 and outside the trend graph display area 22, and if it is outside the area, the process ends. Then the next block 61
0, the first drawing point coordinates X in the new section are calculated, and at this time, the data read from the X-direction reduction/enlargement management table 41 is updated in accordance with the new section. In block 611, it is determined whether the end point coordinate 'j s''l is outside the interval.

If it is outside the section, the process proceeds to block 607, and if it is within the section, the process proceeds to block 604 to draw 1-drawing in the new section.

FIG. 6B is a conceptual diagram of the drawing (coordinate calculation) logic of the data processing device 10 of FIG. 1 when one trend line drawn spans multiple sections. In FIG. 6B, the X-direction expansion coefficients of section 712 and section ll72 are both ax, and the X-direction expansion coefficients are aal.

Let it be a2. The X+y coordinates of points A, B, C, D, and E are (A,, A4), (BX, BF)',
(c,,cy).

(D,,D?), (Ea, EV). Also, the increment vector for one drawing of given trend data is n=(ΔQ
Xl ΔQy). The drawing (coordinate calculation) logic at this time is as follows. First, the expansion coefficient (ax
, al), the starting point A (A,.

Expression 73 (B x=
Ax + ΔQ x - a x g B y = A y + Δ
Calculated by Qy-ax).

Here, since the temporary line point B is outside the section I71, the line segment AB will be drawn as the line segment AD (solid line) from the boundary point of the sections ■ and ■ to the X coordinate Dx, and the line segment DB (broken line) will be drawn. Not done.

Here, the coordinates DX of the point are calculated using the following equation.

The section boundary coordinates are read from the table 43.

Next, a temporary starting point C (C,, C4) visible from the boundary point in the section IT72 corresponding to the starting point A visible from the boundary point D (1) x, Dy) in the section 171 is calculated by the following equation. Next, considering the expansion coefficient (ax, a2) of section 1172, the end point E (E
x, Ey) are calculated using the formula. Here, since the end point E is within the section IT72, the line segment D that stopped at the boundary point
Continuing to draw B on line segment DE (solid line), draw end point E
The drawing for one point of trend data is completed.

Note that E (E,, Ey) can also be directly determined from point A using the following equation.

E, = A, + ΔQX'ax E y ” D y + ΔQy-ax- to 2° Δ Qx'
ax Next, a method of calculating the effective value of the display scale when there are a plurality of sections with different enlargement factors in the display area 22 will be described.

FIG. 7 shows the display area 22 of the display screen. For example, suppose that the area is divided into three in the X direction to provide three sections A, B, and C, and the X direction expansion coefficient of each section A, B, and C is "On. 81+
82. Note that the expansion coefficient in the X direction is the same for the entire area. The distances in the X direction of each section are assumed to be Xo, Xi, and XL.

The positions of the scales So, S1+ 82, etc. relative to the display area are equally spaced in the X direction, and these values are shown in table 45.
The scale interval table 50 can be set to an arbitrary value within the scale interval table 50.

Therefore, the X coordinate position of the scale on the display area is O2L, 2L
・Find by closing.

Here, the scales are found sequentially from the left side in the figure, but if the previous scale (the scale for which the value has already been found) and the current scale (the scale for which the current value is found) are within the same interval (for example, the scale S
2 and S8), the value of the current scale can be easily found, but if the current scale has a different interval from the previous scale (for example, scale S
4 and sa) are the current scale, for example, the effective value EV4 of S4 can be found from the following equation.

The calculation of the effective value of this scale is performed by M and PUll based on the data in the memory 13.

L = x 1' + X2' where R is the increment of 1 scale relative to L when the magnification is 1, Xi' is the distance from the previous scale S3 position to the end of section B, and X2' is the start of section C It is the distance from to the current scale S4, and EV3 is the value of the previous scale.

The value can be set as a table 51 within the table 45. Further, the initial value EVo of the scale can also be set in the table 45.

Also when the expansion coefficient of a part of the section is expanded as shown in (a) to (b) in Figure 8, or when it is reduced as shown in (a) to (c) in Figure 8, "1" The scale values can be changed automatically as shown below.

Furthermore, a ruled line 31 may be drawn in the X direction at the scale position, and in the case of a ruled line within an area whose magnification is enlarged as shown in FIG. 8B, the line type of the ruled line may be changed, for example, as a dotted line 31a. . Data on the line types of the ruled lines may also be set as a table 52 in the table 45, and any line type may be selected using the keyboard.

Furthermore, the background color of the section whose enlargement factor has been changed may be changed.

Although the above description is an example in which the scale is displayed in the X direction, it is also possible to display the scale in the X direction in a similar manner, and the scale may be displayed in both the X and y directions.

Similarly, the ruled lines may be drawn in the X direction or in both the X+Y directions.

Next, an embodiment in which partial enlargement, reduction, etc. can be automatically performed according to the state of input data will be described with reference to flowchart 1 in FIG. The operations in this flowchart are performed by the program in the ROM 1B of the MPU II.

In this embodiment, it is assumed that input data for each point from the data collection device]-0 is sent to the data processing device and displayed for each point.

The target data is, for example, plant data, and partial enlargement and reduction are performed according to the following basic conditions.

(1) First, the input data values are set to the two-limit value Ut and the lower limit L.
x is set, and if it is within the range of Ut and L, it is determined that the input data is within the normal range, and if it is outside the range, it is determined to be abnormal, and the section to which the input data belongs is enlarged and displayed.

These upper and lower limit values Ut and Lx are set in the table 45 as an upper and lower limit value setting table 54.

(2) Input data for a certain period of time (for example, the entire display area range)
If the point is within the normal range, the entire section of points where abnormal values occur is displayed in a reduced size, or the display start point is moved (looper) and scrolled.

Note that the enlargement and reduction display may be performed only in the X direction, or only in the X direction, or in both directions of X+'j, but in the following example, the display is performed only in the X direction.

It will be reduced.

In FIG. 9, first in step 901, the table 54 is checked to see if the current input data is within the normal range. As shown in FIG. 10(a), if the current input data p1 is within the abnormal range, it is checked in step 907 whether the previous input data po was within the normal range. If the previous input data is within the normal range, in step 908 the section to which the current input data belongs (section B in FIG. 10(a)) is determined.
Figure 10 (b
). On the other hand, if the previous input data is also within the abnormal range, since enlarged display has already been performed, the current enlargement coefficient is maintained and enlarged display is continued. This is to display abnormal data in detail.

On the other hand, if it is determined in step 901 that the current input data is within the normal range, then in step 902 it is determined whether the display point of the current input data is outside the display area. If it is within the display area, it is determined in step 903 whether the previous input data is within the normal range. If it is within the normal range, the expansion coefficient of the section to which the current input data belongs is maintained as it is.

On the other hand, if the previous input data po is determined to be within the abnormal range (Fig. 10(c)), the expansion coefficient of the section to which the current input data belongs is returned to the original coefficient and displayed in the original size as shown in Fig. 10D. Step 904).

On the other hand, if it is determined in step 902 that the display point of the current human power data is outside the display area, in step 905 it is checked whether all the input data being displayed is within the normal range, and if all the input data is within the normal range ( (FIG. 10(e)) In step 906, the enlargement coefficient for all sections of the display area is decreased (for example, the enlargement coefficient for all sections is uniformly set as as) to perform reduced display (FIG. 10(f)). This is because data within the normal range does not need to be looked at in detail.

On the other hand, if it is determined in step 905 that part of the data being displayed is within the abnormal range (FIG. 10(g)), a looper is performed in step 909 as shown in FIG. 10(h). The looper is created by changing the position of pointers 26 and 27 shown in FIG.

Note that the above-described processing such as reduction, enlargement, looper, etc. is merely an example, and different processing may be performed depending on the nature of the input data.

Further, enlargement or reduction display processing may be performed depending on the operation mode of the plant. For example, the enlarged display may be performed only at startup.

Alternatively, the upper and lower limits may be set to time instead of the value of the input data, and for example, as shown in FIG. 11, only the coordinate values xo''-xi corresponding to times to-tt may be enlarged (reduced) and displayed.

In this example, the expansion factor for a certain section is increased.

The corresponding enlargement coefficient in the table 41 may be updated by the new enlargement coefficient obtained by the decrease, and drawing calculations may be performed based on the updated value.

In addition, in the present invention, the ruled lines and scales that are displayed when the enlargement factor a=1 and the additional ruled lines and scales that are displayed when the enlargement factor a>1 are distinguished by line type, display color, etc. It is possible to do so.

Regarding the method of adding a background color to each section of the l-rent graph with the same magnification factor, for blocks A to L of the same magnification section of the trend graph display area 22 in Fig. 4,
This can be done by filling in the background with a background color specified by the user in advance, and then drawing the ruled lines 31 and trend lines 25.

〔Effect of the invention〕

According to the present invention, as a single function, (1) multiple areas with different display magnifications (reduced, enlarged, normal) can be displayed on one trend graph. (2) The display density of chart lines can be changed according to the display magnification of each area. (3)
The displayed content changes depending on the display density of each area of the scale.
The display position (density) can be displayed without changing unless specified.

(4) Background colors can be specified for each display magnification, and changes in magnification can be communicated to the operator in color.

These functions not only display a mixture of partial reduction and enlargement, but also display ruled lines and scales to indicate changes in magnification.

There are effects such as being able to communicate to the operator using any of the background colors.

In addition, as a function of the present invention, (1) it is possible to enlarge and display detailed changes in noteworthy parts according to data change trends of the entire system, system operation mode, etc.
The operator who monitors the screen can monitor changes in the detailed display section in real time while grasping the overall change trend. (
2) Since it is possible to cut out unnecessary information using the reduction function and cut out necessary information using the enlargement function, there are effects such as improving the editing function of the display device.

[Brief explanation of the drawing]

FIG. 1A is a block diagram showing an embodiment of the display device according to the present invention, FIG. 1B is a diagram showing details of the memory for display management data in FIG. 1A, and FIG. 2 is a diagram showing data and trends displayed on the display unit. A diagram showing the relationship with data stored in the data memory, Figure 3 is a diagram showing an example of trend graph display, and Figure 4 is the relationship between partial enlargement/reduction display in the display area of the screen and the management table. 5 is a flowchart for explaining the drawing process in one embodiment of the display device according to the present invention, FIG. 6A is a diagram for explaining the drawing logic, and FIG.
Figure B is an explanatory diagram of the drawing logic when one drawing line spans multiple sections, Figure 7 is a diagram explaining the method of calculating the effective value of the scale in the display area, and Figure 8 is a diagram explaining the method of calculating the effective value of the scale in the display area. FIG. 9 is a flowchart 1 of an example of enlarging and reducing a portion according to input data.
10 and 11 are diagrams showing display examples of trend data for explaining the operation of FIG. 9. 2. Data collection device, 5. Arithmetic unit, 6 Memory for trend data, 7. Input data management unit for display, 10. Data processing device, 2. Memory for display 1-rend data, 13. Memory for display management data, 14
... To drawing unit 1, 21-... Display screen, 221
-Rend graph display area.

Claims (1)

[Scope of Claims] 1. In a display device having a memory that stores display information corresponding to predetermined input data, an arithmetic unit that transfers data and performs calculations, and a display medium, an area displayed on the display medium In order to display a part reduced or enlarged compared to other parts, means for specifying the position of the part on the display area, and means for performing reduction or enlargement processing of display information of input data corresponding to the part. What is claimed is: 1. A display device, characterized in that it displays a mixture of areas with different magnification factors within the same display surface. 2. It is equipped with means for selecting the ruled line display density for each same magnification section corresponding to the above partial reduction or enlargement, and means for calculating the ruled line display position for each same magnification section, and corresponds to the change in range due to partial reduction or enlargement. 2. The display device according to claim 1, wherein the display device displays ruled lines. 3. It is equipped with a means for selecting the display density and display content of the display scale corresponding to the above-mentioned partial reduction/enlargement, and a means for calculating the scale display position for each same magnification section, so as to correspond to the change in the range due to the partial reduction/enlargement. 2. The display device according to claim 1, wherein the display device displays a scale. 4. It is provided with a means for making variable the setting of the display area of the display information of the input data stored in the memory, and has a looper function that changes the contents of partial reduction/enlargement without changing the partial reduction/enlargement position with respect to the display screen. The display device according to claim 1, characterized in that: 5. The display device according to claim 1, further comprising means for making the partial reduction/enlargement position on the display screen variable, and has a scrolling function to freely change the partial reduction/enlargement position on the display screen. 6. A memory for storing background color information for each same magnification section corresponding to the partial reduction/enlargement described above, and a means for displaying a background color for each same magnification section, and a background color corresponding to the same magnification section on the display screen. Claim 1 characterized by displaying
Display device as described. 7. Display magnification updating means for obtaining a new display magnification by increasing or decreasing the display magnification of the display section according to the state of the input data, and the calculating means performs calculations in accordance with the new display magnification. The display device according to claim 1. 8. The display magnification updating means includes means for determining whether or not the value of the current input data is within a predetermined range, and when it is determined that the value of the current input data is outside the predetermined range, updating the display magnification of the corresponding display section of the current input data. 8. The display device according to claim 7, further comprising means for increasing the display magnification to obtain the new display magnification. 9. Display magnification updating means for obtaining a new display magnification by increasing or decreasing the display magnification of the display section according to the mode of the input data, and the calculating means performs calculations in accordance with the new display magnification. The display device according to claim 1. 10. In a display device having a display means having a display memory and a display screen for displaying the contents of the display memory, a boundary between each section defining a plurality of display sections formed by dividing the display area of the display screen into a plurality of sections. boundary coordinate setting means for setting coordinate values on the display screen of the display screen; coordinate memory means for storing the set boundary coordinate values; and input data for storing input data having coordinate values corresponding to the display area of the display screen. data memory means; display magnification setting means for setting a display magnification of the input data in each display section; magnification memory means for storing the set display magnification; and based on the contents of the coordinate memory means and the magnification memory means. ,
means for reading out a display magnification corresponding to the coordinate values of the input data in the input data memory means; and calculating the expansion or reduction of the coordinate values of the input data according to the read display magnification and converting the input data into display data. arithmetic means for supplying the input data to the display memory, and performs display in which a plurality of areas with different display magnifications of input data exist in the display area of the display screen.