JPS61275963A - Electronic calculator with graphic display function - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a small electronic device having a graph display function.

[Prior art and its problems] Conventionally, pocket computers, personal computers, etc.
When plotting points on the display screen, the program,
For example, this was done by inputting PSET (30, 20) ENTER to the coordinates that have already been set using the PSET command.

However, once the -collapse fixed point was plotted, this plotted point was fixed at the already set coordinates and could not be moved. Also, there is nothing to display the numerical value of the coordinate point corresponding to the plot point on the 1 display section, for example (3
0, 20) cannot be visually recognized, and even if it were possible, it would take time.

[Object of the Invention] The present invention was made based on the above-mentioned circumstances, and the present invention is a compact device having a plot point on a display section and a graph display function that allows the plot points to be moved on the display section with a simple input operation. The purpose is to provide electronic equipment.

[Summary of the Invention] In order to achieve the above-mentioned object, the present invention includes a memory for storing plot position data displayed on a screen, a memory for storing true coordinate data corresponding to the plot position data, and a screen. keys to move the plot position of
The gist of the present invention is to include means for writing data at the moved plot position into the memory instead of the data in the memory by operating the key.

[Configuration of Embodiments] The present invention will be described below based on embodiments shown in the drawings. FIG. 1 is a diagram showing a first embodiment of the present invention. In the figure, 1 indicates a key manual section, in which operation keys such as function key la, numeric keypad 1b, function key IC, graph key ld, movement key 1e, etc. It is equipped. funksi key 1a
consists of four arithmetic operation keys and an EXE key,
The numeric keypad 1b includes numerical input keys such as O to 9, and the function key IC has built-in functions sin, log, x2 . 1/x
The graph key 1d includes a plot key for specifying a predetermined point, a graph for displaying figures, and a TEXT key for displaying calculation formulas and formulas containing characters.
-1e consists of four keys that move the specified point specified by the plot key forward, backward, left, and right. Each data outputted from the key human power section 1 corresponding to each operation key is sent to the control section 2.
It is now entered into This control section 2 is responsible for the central control of the entire circuit, and a formula buffer 3 consisting of a readable and writable RAM is connected to the control section 2, and is preset with various data inputted from the key input section 1. and an arithmetic circuit 5 equipped with an addressing section 4.
is connected. 6 is horizontal: X is M dot, for example 96 dots.

Vertical: y is a liquid crystal driven display section consisting of N dots, for example 64 dots, and this display section 6 is connected to the addressing section 4 via a text display buffer 7 and a graphic display buffer 8. Text display buffer 7
and the graphic display buffer 8 is a read/write RA
Each pixel memory has a one-to-one correspondence with each pixel (dot) of the display section 6, and each pixel memory is turned on and off by a command from the rear addressing section 4. The text display buffer 7 temporarily stores numerical values and character display data of coordinate points, and the graphic display buffer 8 temporarily stores plot points and graphic display data. Furthermore, a storage unit 10 consisting of a readable and writable RAM is connected to the control unit 2.
This storage unit 10 stores X*l range information, which is a numerical range in the X direction and Y direction on the graph display screen.
n ,
For example, by operating the M and N registers in which the numerical values M=96 and N=64 are stored, the x and y registers in which values indicating the address of each element memory of the graphic display buffer 8 are stored, and the movement key 1e, There are Xl, Yl registers in which values indicating addresses are moved from the X, Y registers and stored, and X, Y registers in which numerical values at display positions (X, Y) of plot display are stored ( Figure 2)
, Furthermore, the storage unit 10 stores various calculation results of the calculation circuit 5,
For example, the horizontal pixel of the display section 6: X is 96 dots, the vertical pixel is 64 dots, and the range information is 2xm! A data storage section is provided for storing the numerical width between unit pixels in the X direction and the numerical width between unit pixels in the Y direction, which are determined by n, X5ax, Yein, and Ysax. The arithmetic circuit 5 and the formula buffer 3 and the arithmetic circuit 5 and the storage section 10 are connected by a bidirectional bus.

[Operation of the Embodiment] Next, the operation of the embodiment will be explained according to the flowchart of FIG. 3.

The range information for the display unit 6 and the number of dots on the screen are input from the key input unit 1, and Xm1n + X5ax and Yeln are input.
, Y, ax, and M and N registers, respectively. First, input desired data into the formula buffer 3 and operate the EXE key. Then control section 2
examines the inside of the formula buffer 3 where the function formula is input from the function key IC or the numerical value is input from the numeric keypad 1b (step AO) 0 Then p I Ot in the formula buffer 3
” is specified (step A1),
If there is no plot designation, the process proceeds to other processing, which is, for example, processing for performing one normal calculation. If there is a plotting instruction, proceed to step A2 and judge whether numerical data of true coordinates has been input from the key human power section 1 (
Step A2), if there is no numerical data, calculate the true coordinate axes determined from the range data and the numerical values of the blinking coordinate points in order to blink the (dot) pixel at the center of the screen of the display section 6. Therefore, the horizontal direction data M/2 at the center point of the screen of the display section 6 is stored in the X register of the storage section 10 (step A
3) Set the vertical data N/2 in the y registers (step A4).

This is screen coordinate data based on the lower left corner of the display unit 6. Next, substitute the horizontal value M/2 of the center point of the screen into the formula % formula % consisting of the setting range data entered in advance. and converts it into a true X coordinate based on the origin (step A5), and the obtained X value is stored in the storage unit 10.
Set 0 in the X register of A
6), and sets the obtained value of Y in the Y register of the storage unit 10. Further, in step A2, when it is determined that there are input numerical data X and Y from the key input section 1, the values of X and Y are immediately set in the X and Y registers of the storage section IO, respectively. Next, the input numerical value The calculation unit 5 assigns the input numerical value Y data to the expression % expression %) consisting of range data to set the y coordinate with the lower left corner of the display unit 6 as a reference. Then, the value of the dot position My to be blinked is set in the y register of the storage section 10 (step A9).

First, by pressing only the plot key,
As shown in (Step A3. Step A4), the plot point data (x, y) of the coordinates based on the lower left corner of the display section 6 is extracted from the X, y registers of the storage section 10 and stored in the graphic display buffer. 8 and causes the dot segment (x, y) to flash on the display section 6 (step ALO).

Subsequently, the X, Y numerical data of the true coordinates from (step A5, step AS) is pulled out from the X, Y register of the storage unit 10, preset in the text display buffer 7, and the ( The dot segments (x, y) are turned on, and the numerical value X or Y of the true coordinates is displayed using a part of the screen (step A11).

Similarly, as shown in FIG. 5(a), (step A8,
The plot point data (x, y) of the coordinates based on the lower left corner of the display section 6 from step A9) is stored in the storage section lO.
The data is extracted from the x and y registers and preset in the graphic display buffer 8, and the (x+y) dot segment is made to blink on the 1 display section 6 (step Al0).
The input numerical values X and Y data from (step A7) are extracted from the X and Y registers of the storage section 10, preset in the text display buffer 7, and a dot segment of (x, y) for displaying characters is displayed on the display section 6. The light is turned on and the numerical value X or Y of the true coordinates is displayed using a part of the screen (step A11).The numerical value X and Y data may be displayed in a switched manner or simultaneously.

Next, the operation when the movement key 1e is operated will be explained according to the flowchart shown in FIG. When the movement key le is pressed, the value of the previous plot point (X.

y) are X+, Y+ from the x+V register in the storage unit 10.
The plot point is moved to the register (step BO). At this time, the plot point moves one pixel (dot) at a time on the screen of the display section 6, that is, the horizontal and vertical values of the coordinates with respect to the lower left corner of the display section 6 are At this time, the true X and Y coordinates are range information: X*in, X*ax, Ysin, ywa.
The numerical width value between unit pixels in the horizontal and vertical directions determined by x and the numbers M and N of dots is increased or decreased. For this reason, movement key 1
It is determined whether the operation e is a vertical movement operation (step Bl). If it is determined that it is not a vertical movement, it is determined that it is a horizontal movement, and a new xt1 is stored in the X register of the storage unit 10.
or set x-1 (Step 8290) Next, calculate the new value of xt1 or x-1 using the formula % formula % consisting of range data to find the numerical value X of the true coordinates with the origin as the reference (Step 8290) B3), and this new numerical value X is stored in storage unit 1.
Reset the X register to 0.

In addition, in the above (step Bl), if it is determined that the movement is up or down, a new y+1 is stored in the X register of the storage unit 10.
Or set y-1 (Step B4) 0 Next, calculate the new value of y+1 or y,-1 using the formula % formula % consisting of range data to find the numerical value Y of true coordinates based on the origin (Step B5), and store this new numerical value Y in the storage unit l.
Reset to the ・Y register of O.

Next, the XI+1+ that is still flashing on the 6th screen of the 1st display.
Turns off the dot segment in the register.

At the same time, the original numerical values X and Y of the true coordinates are also turned off (step B6). As shown in FIG. The data is extracted from the X,
) is extracted from the X and Y registers of the storage section 10 and reset to the text display buffer 7, and the (X.

The dot segment y) is lit to display the true coordinate value X or the original coordinate value Y (step B8).

Similarly, when the left and right keys of the movement key 1e are pressed, the control unit 2 first selects xt, which is still blinking, on the display unit 6 screen.
y+ Turns off the dot segment in the register,
At this time, at the same time, the original numerical value X of the true coordinates.

Y is also turned off (step B6), and the new coordinate data (x, y+1) from (step B4) is stored as x in the storage unit 10.
, graphic display buffer γ8 drawn from the X register
and causes the dot segment to blink on the display section 6 (step B7).

Subsequently, the numerical data (X, Y) of the true coordinates from (step B5) are pulled out from the X, Y registers of the storage section 10 and reset to the text display buffer 7, and the data (x, Y) for character display are displayed on the display section 6. The dot segment of y) is lit and the true coordinate value X or new Y is displayed (step B8). By pressing or keeping pressing the left/right and up/down keys of the movement key 10 many times, steps B2 to B
Repeat Step 5 to increment the coordinate values based on the lower left corner of the display section 6 by one dot in the vertical and horizontal directions, and set the new true X and Y coordinate numerical data arbitrarily while visually checking the screen on the display section 6. can do.

[Effects of the Embodiment] As described above, according to this embodiment, it is possible to easily change the plot points once displayed on the screen, and moreover, it is possible to easily change the plot points displayed on the screen. It is possible to display coordinate data at the same time, and it has the effect that setting the graph screen and confirming the position can be performed extremely easily.

[Effects of the Invention] As explained above, according to the present invention, a memory for storing plot position data displayed on the screen, a memory for storing true coordinate data corresponding to the plot position data, and a single screen keys to move the plot position of
Since the apparatus is provided with means for writing data of the moved plot position into the memory in place of the data in the memory by operating this key, the effect that the plot position can be easily corrected after plotting can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of an embodiment of a small electronic device having a graph display function according to the present invention, FIG. 2 is a diagram for explaining the present invention in detail, and FIG. 3.4 is a diagram for explaining the present invention in detail. FIG. 5, a flowchart for explanation, is a diagram showing an example of plot points and numerical display displayed by the small electronic device of the present invention. l...key human power section, 1e...movement key, 2...control section, 3...mathematical buffer T
, 4... group address designation section, 5... arithmetic circuit, 6... old display section, 7... group text display buffer, 8... graphic display buffer, 10...・
...Memory department. Patent applicant Casio Computer Co., Ltd. Xm1n
Xr@ax
Figure 2

Claims (1)

[Claims] In a small electronic device that displays graphics on a screen, there is a memory that stores the data of the plot position displayed on the screen, a key that moves the plot position on the screen, and a key that changes the data in the memory by operating this key. 1. A small electronic device having a graph display function, comprising means for writing data of the plot position after the movement into the memory.