JPS63101956A - Electronic equipment - Google Patents

Abstract

PURPOSE:To display whole graph on a display screen without forming an additional memory by displaying the residual part of the graph corresponding to an arithmetic result successively along its locus like scroll. CONSTITUTION:A key input device 3 is electrically connected to a functional electronic calculator 1 so as to input the contents of a key to the body 1. When a trace instruction key is depressed, the residual part of a graph which can not be displayed on a screen 6 is successively calculated by an arithmetic means and successively displayed like a scroll along its locus based on the successively calculated arithmetic results. Thereby, the whole graph can be displayed without forming many virtual pictures (buffers).

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention is an electronic system that can display the fl part of a graph, which is not neatly displayed on a screen, along the trajectory of the graph. The present invention relates to electronic equipment such as a graph display device or a function desk with a graph display function.

<Prior art> The amount of graph display function that has been proposed so far is t! The i-Calculator is equipped with virtual screens (buffers) for one screen at a time on the top, bottom, left and right in order to display the remaining part of the graph that was not fully displayed on the display screen. The remaining portion of the graph is configured to be displayed on the display screen.

<Problems to be Solved by the Invention> However, in the above-mentioned scientific calculator with a graph display function, the remaining part of the graph can only be displayed on one screen in the vertical and horizontal directions, so the entire graph cannot be displayed. The problem is that it cannot be displayed. Additionally, in order to solve this problem, a method of preparing a large number of virtual screens (buffers) can be considered, but this method has the disadvantage of requiring a large capacity of memory and increasing costs.

Therefore, it is an object of the present invention to calculate the remaining portion of the graph that cannot be completely displayed on the display screen through calculation, and to sequentially scroll the remaining portion of the graph according to the calculation result along the trajectory. An object of the present invention is to provide an electronic device that can display the entire graph on a display screen without providing a separate memory.

<Means for Resolving Interval Points> The present invention provides a trace instruction key and a means for sequentially calculating the remaining portion of the graph that cannot be completely displayed on the screen in response to the operation of the trace instruction key. , scrolling means for sequentially displaying the remaining portions of the graph on the screen based on the calculation results sequentially obtained by the calculation means.

<Function> In the present invention, when the trace instruction key is operated,
The remaining portion of the graph that cannot be displayed on the screen is sequentially calculated using the calculation means, and the scrolling means is used to sequentially scroll the remaining portion of the graph along the trajectory based on the sequentially obtained calculation results. It will be displayed. Therefore, the entire graph can be displayed without providing many virtual screens (buffers).

<Embodiment> FIG. 1 is a plan view of a scientific calculator with a graph display function according to the present invention. In the figure, 1 is a scientific calculator body provided on the left side of a flexible cover 2 that can be folded in two from the center, and 3 is a key manual device provided on the right side of the cover 2. The human powered device is the scientific calculator body 1
It is electrically connected to the main body, and the key can be operated manually in the same way as the key input device on the main body side.

5 constitutes a display device, and in particular 6 constitutes a 96 x 32 dot L
It is composed of a CD (liquid crystal spring) v), and shows a graph display section that can display 166 x 10 characters and graphs, and 7
The 0 portion indicates a status display section for displaying a graphic symbol or the like related to the operation key when a specific key is operated to notify that the device is in a specific state.

8 is a mode changeover switch, and by sliding it you can switch to COMP mode (mainly a mode for performing various calculations),
5TAT mode (statistics related mode), AER-I
and AER-II mode (algebraic expression storage mode). 9 is the graph display section 6
This is a label that displays the type of graph to be displayed.

[] Mouth 5 [The mouth is the water root key used to find the intersection point (tree root) of multiple graphs displayed on the screen, and d is the graphic command key that is operated before entering the formula for the graph to be displayed. Yes, this command is executed by the operation of the natural key (IK key).

EE is the autograph command key to automatically set the Y-axis direction range of the graph related to the input formula and graph it. ), l is the command key to connect two points on the graphic screen with a straight line; This key clears the entire screen except for the coordinate axes.

FIG. 2 shows the block configuration, and to explain it a little based on this diagram, 3 and 4 are key human power devices, 5 is a display device consisting of a graph display section 6 and a status display section 7, and 8
is a mode changeover switch. Further, 10 is a ROM (read only memory) for storing various programs;
is a CPU (central processing unit) that controls various calculations and other blocks based on the programs in ROM 10.
, 12 is a RAM (read/write memory) having a capacity of 8 Kbytes, and this RAM is used as a variable memory group 13.
, an array memory group 14, the actual contents of the array, a key input buffer, etc., are provided.

Note that the array memory group 14 does not store actual numerical values, but stores a pointer to an address in the general-purpose RAM 15 and the size of the array.

Further, the key-powered device 3.4 is provided with a total of 90 key switches, and by operating these keys, power can be turned on and off, calculation formulas can be input, and various commands can be executed. Each key has 1 to 50 functions, depending on the combination operation with other keys, the display content on the 7-status display section 7, and the setting position of the mode changeover switch. 1
6 is a communication interface circuit.

FIG. 3 is a main processing flowchart of the scientific calculator according to the present invention, and the operation will be explained based on this diagram. A brief explanation of the terms used in the flowcharts from FIG. 3 onwards is as follows.

(1) Xsft, Ysft...Number of scrolling dots in the graph display section 6 (2) XPdot, YPdot...XY drifting of the dot on the currently blinking graph (3) XRdot, YRdot -XPdot, Y
XY coordinates on the Pdot screen (4) Xmax (min), Ymax (min)
・=Display range on screen (5) Xdot, Ydot
--The size of X and Y per dot on the screen determined from Xmax(min) and Ymax(min)
When the key or key is operated while a graph such as 1 is displayed, the trace function mode is activated (Sl). In the trace function mode, the trace starting point (dot) of the graph is determined by processing according to the flowchart shown in FIG. 4, and is displayed blinking as shown in FIGS. 5A to 5C. Furthermore, when the ``K'' key is pressed, processing is done so that the cursor blinks as far as possible on the right edge of the screen. Incidentally, FIG. 5A is an example of display by the process of step n3, where XPdot = Xmax, YPdot =
In the process f(Xmax), the dot to be blinked is at the far right edge of the screen, its X coordinate is Xmax, and its Y coordinate is H.
According to f(Xmax). Further, FIG. 5B is an example of the display resulting from the process of step n6, and FIG. 5C is an example of the display resulting from the process of step n5. Cave 6 is step n4 of Ka 4
It shows the specific processing contents.

When the trace start point is displayed blinking as described above, it is detected that the leave key or the > key has been pressed in steps 82 to S1m in Fig. 3, and which key has been pressed is displayed in the work area. After setting (S3, S5), the process advances to step S7. If the <,> key has not been pressed, the process advances to step S6 to check whether the clear key or any other graph function key has been pressed, and if it has been pressed, the process ends.

The specific processing contents of step S7 are as shown in FIG. To explain this processing flow, first, initial settings are performed (Pl), and then the X and Y coordinates of the dot on the graph to be blinked, XPdot and YPdot, are determined. Then, step P3. Check whether there is scrolling in the Y direction by step P5, and if scrolling is necessary, proceed to step P4. Find the number of dots to scroll in P6.

Similarly, step P7. P8. After checking the scrolling in the X direction in P9, it is determined whether it is necessary to scroll in step PLO, and if it is necessary to scroll, proceed to step Pli and perform X5ft, Ys.
After crawling in the XY direction by ft (clot), the process advances to step P12. On the other hand, if there is no need to scroll, the process immediately advances from step PIO to step P12. Then, in step P12, the graph corresponding to the amount scrolled is displayed on the graph display section 6, and further in step P1
Dora on the graph that should blink next in 3) XPdo
t.

Find YPdot and make it blink.

In this way, when the <> key (trace instruction key) is operated, the remaining parts of the graph that cannot be displayed on the screen are calculated one after another by the calculation means, and the calculated results are Based on this, the remaining portions of the graph can be sequentially scrolled and displayed along the locus, and the trace start point of the graph can be displayed blinking.

<Effects of the Invention> As explained in detail above, according to the present invention, the remaining portion of the graph that has not been displayed on the display screen can be calculated, and the screen can be changed according to the calculation result. Since the remaining portions of the graph, which are the results of crawling and calculation, are displayed one after another, the entire graph can be displayed on the graph display section 6 without providing any virtual screen (buffer).

[Brief explanation of the drawing]

FIG. 1 is a plan view of a scientific calculator with a graph display function according to the present invention, FIG. 2 is a block diagram of the same, FIGS. 3, 4, and 6.
Figures 7 and 7 are processing flowcharts, Figures 5A and 5B.
FIG. 5C is a diagram showing a trace starting point. 1 is the main body, 2 is the cover, 6 is the graph display section, 11 is the CPU, 12 is the RAM 0 Agent Patent attorney Takeshi Sugiyama (and 1 other person) 42 figures 3 Figure z 4 Figure 16 package

Claims (1)

[Scope of Claims] 1. In an electronic device that can calculate an input calculation formula and create and display a graph based on the calculation result, a trace instruction key and, in response to the operation of the trace instruction key, Means for sequentially calculating the remaining portions of the graph that could not be displayed on the screen, and sequentially displaying the remaining portions of the graph on the screen based on the calculation results sequentially obtained by the calculating means. An electronic device comprising: scrolling means.