JPS61157966A - Electronic desk calculator - Google Patents

Abstract

PURPOSE:To display data in accordance with a numerical formula to facilitate understanding of the operation state by constituting a display device in plural stages and displaying a constant, an operand, and the operation result simultaneously and changing the display position of the constant in accordance with the operation formula. CONSTITUTION:A liquid crystal display device 6 is so constituted that numeric data are displayed in four stages, and a display part 7 in the first stage, a display part 8 in the second stage, and a display part 9 in the third stage consist of display elements or the like where address numbers of a data memory 4 are displayed. A display part 10 in the fourth stage is provided with operator symbol display elements 10a and numeric data display elements 10b, and entry data and operation results are displayed there. In the constant calculation, the constant is displayed in the second stage of the display device 6 in case of addition or multiplication and is displayed in the third stage of the display device 6 in case of subtraction or division to display data in accordance with the numerical formula. Thus, the display device 6 is constituted in plural stages, and the operand and the constant are displayed in case of the constant calculation, and the display position of the constant is changed in accordance with the operation formula, and data is displayed in accordance with the numerical formula.

Description

DETAILED DESCRIPTION OF THE INVENTION (A) Field of Industrial Application The present invention relates to an electronic desktop calculator that can distinguish and display constants and operands when performing constant calculations.

(Note 2) Conventional technology played a role in VCt-2 tabletop calculators, for example,
It is configured so that the L') VC input shown in No. 5-51222 is input, four arithmetic operations are performed on the numerical data, and the result is displayed on the display 4, but is it a fixed income calculation? When doing so, the constants are not displayed, only the manually entered operands and the calculation results are displayed, making it difficult to understand the constants.

(c) Opening point that the invention aims to solve The present invention was made to solve the above-mentioned problem of τ, and is configured to display the constant when calculating the constant and clearly distinguish it from the number of compensated X. The purpose is to provide an electronic desktop calculator with the following functions.

2) Means for solving the opening point The present invention has a display device with multiple stages for 1s, and simultaneously displays the constant, the compensation' arithmetic and the operation x' @ result, and The display of the constant and the number of compensated IEs is configured to change according to f.

(E) Function Since the present invention is configured as described above, the constant is displayed when a constant is calculated, and the display position of the constant is changed according to the calculation. .

(f) Example Hereinafter, embodiments of Akira Hontaku will be described with reference to the drawings.

FIG. 1 is a block diagram showing the configuration of the electronic tabletop counter of the present invention. τII is a sterilization circuit composed of a microprocessor, and a processing program is stored in advance in response to key signals from the keyboard +21. Program memory +31
Performs performance, display control, etc. according to the program, (
4) is a data memory in which numerical data or podium data inputted from the keyboard (21) is stored, and the writing and reading of data is controlled by the control circuit Ill. It is configured to be able to store 99 items of data indicated by addresses numbered .about.99.

Each address has an @area (4a) for storing descriptor data and an area t! for storing number...q data! I1. (4b). ] 51 is a liquid crystal drive circuit that drives the liquid crystal display 416I based on the display data provided and received from the control circuit (2). fr! 1. +'+ii display 516) is configured so that numerical data is displayed in four rows as shown in FIG.
The eye display 19) includes a display element t7a) t8a) t9a) that displays the address number of the data memory 141, an operator symbol display element (7bJ (8bJ (9b)) and a numerical data display element L7CJ (8 (1 (9CJ)). It consists of

Input data is displayed sequentially to allow confirmation of the progress of tfX calculation. The fourth stage display 11υ has an operator symbol display element ti ga ) and a numerical data display element (10
bJ is provided to display numerical data and calculation results! S has been completed. Furthermore, the fourth stage numerical data display element (
10b) are the numerical data display elements (7) from the first stage to the third stage.
0) L8CJ (larger than 903, f
The t-number data and calculation results are made easy to see. In addition, the symbol 13dJL9d) on the second and third display c8c91 lights up when indicating a constant during constant calculation, and in addition to what is displayed for σ11, there is still data left in the data memo January 4th. oz is a symbol indicating that the data memory +43 is over capacity.

FIG. 3 is a diagram showing the key arrangement of the keyboard 12+.

For normal number entry - (2aj, four arithmetic keys (2b
) as well as a subtotal key t that displays the intermediate results of calculations.
2c1. In combination with the numeric keypad [2a], select the address of the data memo January 4+, or use the correction key t2d to start correction of the input f-even and read out the contents of the data memo January 41 sequentially and display the R key. scroll key t7
-f3)L2f).

Figure 44 and Figure 5 are diagrams showing the functions of the built-in memory or register in the ``hu'' path. 13 is a display memory where display data is stored, and 6 displays 1G! 13a J ~ (13d J corresponds to display 4 (6; 01st to 4th rows, respectively, data memory 14) area (160) for storing address information.

31J4, which is composed of an area t13f) for storing the operator q-value and an area C15g) for storing numerical data.
L1 is a register in which numeric data input from the 1fd keyboard 121, calculation results from an arithmetic circuit (not shown), etc. are stored.
4a3 is the numeral data f,,L14t)J is the constant data, (14CJ is the calculation fI! result, (14d) is the data transferred from the data memory +4J, (14θ] is the data stored in the data memory 141) tl and 4f'J are allocated to store the maximum address data stored in the display memory (13), respectively. (14g) is a flag area, which is composed of a plurality of flags. Fl is the fjL number 7 lag, F2 is the addition flag, F3 is the subtraction flag, F4 is the multiplication flag, and F5 is the division flag.

F6 indicates a correction flag and Fl indicates an equal key flag, respectively. ,! The i'1J11 circuit Ill is configured to perform arithmetic processing by exchanging data between the data memory 14I1 storing input data, the display memory a3, and the register I according to the program of 1a Migram Memo Month 31.

Next, the operation of the present invention having such a configuration will be explained based on the flowcharts shown in FIGS. 7 to 11. Here, a case will be described in which, for example, a 5+3-2+4+7-170 calculation is performed.

First, when the "ON" key on the keyboard +21 is operated and the power is turned on, the control circuit tl+ clears all the memory etc. and displays "0" on the fourth stage display of the display (6).In this state The control circuit checks which key on the board (2) is pressed.

When the first number r5J is entered on the keyboard 12.

The control circuit Il+, which has taken in the numeric data in the numeric register t14a)K, sets the numeric flag (Fl) and writes the numeric data to the display memory 0 area (15d) to display the display 516; The electronic data is displayed in the fourth row (see FIG. 12A).

When the "+" key is pressed on the arrow, lIi'll Cape Circuit +1
1 sets the addition flag (F2) and sets the number register (1
Transfer the data of 4aJ to the constant register (14bj), and after checking whether the data memory (4) is full, add 1 to the value of register [14eJ] Data memo data ``5'' is transferred to the address of month 41, that is, address 01. At the same time, the address data "01" and the numerical data "5" are transferred to the area * (13c) of the display memory a3. Therefore, the address data "01" is displayed in the fifth row of the display 6161.
and the number 1 shift data “5” is displayed. Then, an addition operation is performed between the value of the operation result register (140), in this case "0", and the constant register (14bJ), and the operation result is stored again in the operation result register L 140 . Thus “+”
Cow g1! At this point, the control circuit +11 performs this amount of processing and returns to the state of waiting for the next key. This I! ! ! #Ij(
2) I! I! l path (l is register (14θ) (14f
Data memo to J January 41. ! : The maximum address data of display memory a3 is set to "01" (see FIG. 12B), and when "5" is set next, the rft number register 14aJ and display memo 1J (130 area ( When "3" is input in 13'd), the state shown in FIG. 12C is reached.

If "-" is pressed continuously, the voltage decrease flag fL is activated during the control circuit.
F5), transmits the data in the numeric register [14a) to the constant register (14b), and checks whether the data memo 4j is full.
40) and transfers the data to the address added by 1. Therefore, "3" is written to address 02. Also, the same IQK display memory (13 @ area t
13t) ) After transferring the data of area (1303),
The data at address 02 is transferred to area t13c). Therefore, the state shown in FIG. 12 DK is reached, and the display on the display C61 is moved by one step. and operation result register (14c)
Addition operation is performed between the value "5" of the constant register L14b) and the value "3" of the constant register L14b), and the result of the operation is stored again in the operation result register t.
14c JK memorized.

After that, if you input the keys sequentially on the keyboard 121 in the same way, 2
As shown in Figures 12E to 12IK, the processing in the control circuit is carried out, and when the if key (L2g) is pressed, the flag in the control circuit is turned off, and after 7 seconds the equal flag (Fl) is set. A determination is made as to whether or not. In this case, it is not set, and a 1M arithmetic operation is performed on the data in the constant a register L14b and the operation result register (14C), and the operation result is inputted into the operation result register (140) again. It is also transferred to the area t13d).

Therefore, the calculation result is displayed on the display (6104th row (FIG. 12 J#@)).

The display memo 1Jn3 is configured so that when it becomes full and new data is input to the arrow, the oldest data is deleted.When the data at address 04 is displayed as shown in Fig. Pond data is deleted and displayed; scrolled. Similarly, at the end of the calculation, address 01.02 has been erased as shown in FIG. 12 JK.

Next, if you want to know the intermediate results during the calculation, use the first
As shown in Figure 5, when you press the subtotal key (2C1) on the keyboard + 21, the key signal is taken in, and the value of the calculation result register (14CJ is displayed in the via circuit).
13 territory H, (Display by transferring to 13dJ!
(The intermediate result is displayed on the fourth row of 6!. At this time, the display element (◇J) indicating the intermediate result is lit. Therefore, in the above example, if you want to see the intermediate result of 5+3-2, 5+3-2
When the subtotal key (2C) is operated after inputting , the state shown in FIG. 13 is reached, and the calculation result "6" is displayed on the display (61).

Next, the operation 'f'F, which checks whether the calculation result is correct after the calculation is completed, that is, whether the input data is correct, will be explained. At the end of tA calculation, the display (61) displays addresses 05 to 05 as shown in Figure 12 J, and address 01.02 has disappeared, so press the scroll key to display the data at address 01.02. Operate t2ft. When you operate the scroll key (2r) once, the control circuit that detected scroll key No. 9 reads the maximum address from the register (14f) that stores the maximum address of 1 display memo old 13, The calculation of the maximum address -3 is performed, and the data of the data memo monthly 4th column is read out and transferred to the save register (14d) by specifying the address indicated by the calculation result.Then, the control circuit 10 displays the display menu (region 13 jJEL 13a). ) ~(13
0) is shifted downward by one step and the data in the save register (14d J is transferred to the area t13a of the display memory 03), leaving the area (131 empty), and the state shown in FIG. 14A is restored. Therefore, On the display (6I, data disappears at address 05, data at addresses 02 to 04 is displayed, and the display is scrolled one step. As a result, control circuit +11 registers <14 which stores the maximum address of display memo Ut131)
f) rewrite data to r04JK, data memory 14;
The register that stores the maximum address of , the control circuit Il+ lights up the symbol 1111 of the display 516;
; indicates that data is stored. If you press t again (scroll key (2f')), the data of the same gate KL-C"011M as mentioned above will be added to the data memo January 4.
1 and displayed as shown in FIG. 14B.

Therefore display ii! 6! You can check the first to third input data from IIC.

After confirming the inputs up to the 5th key, 4
? In order to see the input data of the eyes, this summer I will use Syo-Ruki (
20), a scroll key signal was detected.

The V+S circuit +11 checks whether the correction flag (F6J) is sectored or not.
) is not sectored, so the MJI circuit... is register t
The maximum display address number is read from 14f') and +1 is added to the read value. Register t14fl: is “
Data memory 14 where 03j is stored and added +1
Data is read from the address "04" of 1 and transferred to the save register L14dJ. and g of display memory u3
itg, (15a j ~L 13c Jo Qi/1
After shifting in the upward direction, the data is transferred from the save register t14dJ to the area L1!13 of the display memory +13.

At this time, the register t iar> is changed to "04", and by comparing the values of the register t14e) and the register (14f'J), the symbol rtu is lit in the same manner as described above.Thus, as shown in FIG. It becomes the state shown in r04J
By displaying the data, the input data for the fourth dish can be confirmed.

The state shown in FIG. 14AK is reached, and the ri4J data is displayed, allowing the fourth input data to be confirmed. Next, scroll key again (2e 3
By operating t-, the fifth data is displayed for the same rock as shown in FIG. 12J. At this time, register t
148 J register (14r> values are the same,
The symbol G11 is turned off. In this way, the display can be arbitrarily scrolled by operating the scroll key (2θ1 (2r)), and input data can be easily confirmed.

Next, a fixed income calculation that effectively utilizes a plurality of numerical display elements will be explained. For example, a multiplication calculation using "2" as a constant will be explained. First, enter a number from the keyboard 12), press the 1 multiplication key (2b), then add "3" to the a number and press the equal key (2g).

Processing is performed and displayed as shown in Figures 15A to 5! +61 is displayed.

Next, for example, when the multiplicand "5" is set, the control circuit md that stores the recovered data in the set number register <14a> judges whether or not the equal flag tF7J is set. Now, by the multiplication mentioned above, the recall flag (Fl)
has been sected, so the control circuit III clears the display memory q3 and the data memo sound 41, and then clears the register 7 lag (Fl) and transfers the data of the register t14aJ to the area of the display memory σ3*. t13cl) numerical data “
5" will be transferred. Therefore, the 4th row of the display (6;
5" is displayed [see Fig. 15E], and when the equal key t2g) is pressed, the control circuit...
M) After t'' reset, it is determined whether the 2 equal flag (F7) is set.

Since the equal flag tF'7') is still set, the process proceeds to the constant calculation routine and sets the 1 multiplication flag (F4).
is set, the data "2" in the constant register (14b) is multiplied by the numeric data in the numeric register (14a). At this time, data in constant register (11) 7 is transferred to area (13bJ) of display memory a3, and data in area (13dJ) of display memory α3 is transferred to area (13dJ).
Transferred to 130J.

Furthermore, the data of the calculation east register (140J) is transferred to the area * (13d) of the display memory G3.
As shown in F, it is displayed on the display (61).

At the same time, the second stage display (8) indicates -8K in the control circuit.
(8d) is turned on to fully indicate that the constant is "2". Therefore, it can be easily seen from the symbol KK that the constant is "2" and from the X symbol that it is a multiplication constant calculation. When further performing the constant count 'X, enter the number and press 1 key t2.
g) by pressing t.

Multiplication calculation of the constant "2" can be performed in the same manner as described above.

Also, in the case of constant calculation for division, follow the same procedure as I81, enter the dividend, and select ``Is it equal to -?''. -(Press 2gJ from K, the first
It is displayed as shown in 61g. In this case, the dividend is displayed on the second row of the display 616), and the constant is 5 on the display 16).
By displaying it in rows, it is displayed exactly as the formula is displayed, making it easy to understand.

Although not shown, constant calculations for addition and subtraction can be performed in the same way; in the case of addition, the constant is displayed on the second row of the display +6+ as in the case of multiplication, and in the case of subtraction, the constant is displayed on the second row of the display +6+. As in the case of division, set the constant to 3 on display 16+.
By displaying on the first row.

The display will be as shown in the formula.

(g) Effects of the invention As mentioned above, the electronic desktop calculator of the present invention has 1 display 6 (I
It is configured in several stages, and in the case of constant calculation, the ML operation number and constant t- are displayed, and the display position of the constant is changed according to the calculation formula, so that the calculation status is displayed as the formula is displayed and the calculation status is easy to understand. Besides, it has a great practical effect.

[Brief explanation of the drawing]

Fig. 1 is a block diagram showing the configuration of the electronic desk calculator of the present invention, and Fig. 2 is a diagram showing the configuration of the liquid crystal display shown in Fig. 1.
Figure 5 shows the configuration of the keyboard in Figure 1, Figure 4 shows the configuration of the display memory, Figure 5 shows the configuration of the register, Figure 6 shows the configuration of the data memory, Figure 7,
Figures 8, 9, 10, and 11 show the operating states of Figure 1.
Figure 12J. Figure 13, Figure 14 A, Figure 14 B, Figure 15 A-1
FIG. 5F, factor 16, is a diagram showing the operating states of FIGS. 4, 5, and 6. Ill...Control circuit, (2I...Keyboard, 13
G...Program memory, 141...Data memory,
(51--Drive circuit, (6I...Display device. Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7, Fig. 8, Fig. Kq, Fig. n, Fig. 12).
A Fig. 12 B Fig. 12 C Fig. 15O Fig. 12 E Fig. 12 F Fig. 12 G Fig. 12 H Fig. 12 I Fig. J Fig. 13 Fig. 14 A Fig. 14 B Fig. 15 A Figure 15B Figure 6C Figure δO First brain E Figure 16

Claims (1)

[Claims] 11. Consisting of a keyboard for inputting numerical data, operator data, etc., arithmetic means for performing arithmetic operations based on the input data, and multiple display elements for displaying input data and operation results. 1. An electronic desktop calculator comprising a display means, characterized in that the constant, the operand, and the calculation result are simultaneously displayed on the display means when performing a constant calculation. (2) The electronic desk calculator according to claim 1, characterized in that the display means is provided with instruction means for indicating a constant. (3) The electronic desktop calculator as set forth in claim 1, characterized in that the display position of the constant on the display means is changed in accordance with an arithmetic expression.