JPS5836371B2 - Display method of calculators, etc. - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a display method for a calculator, etc. that continuously displays displays corresponding to numerical keys and calculation instruction keys according to the order of key operations, and in particular, the present invention relates to a display method for a calculator, etc., which continuously displays displays corresponding to numerical keys and operation instruction keys, and particularly to This relates to a display method that corresponds to the .

Conventionally, for example, in formula display calculators, 123X
The numerical value shows all the contents of the operation, such as 45÷7.

Although this method can check the input of numerical values, it has the disadvantage that it will quickly overflow unless the display capacity is large enough.

The present invention uses calculation instructions (
This method focuses on checking the order of calculations, including functions), and is suitable for checking whether functions and numerical values are operated in the desired order, and in particular, whether the function keys are pressed without making mistakes.

In other words, the operation process is displayed in a short form such as AXB+C+D NXN+N+N, for example 12
When 3X34÷7+3, this is A×B+C+I)
It is intended to be displayed in place of .

In other words, the content of the lead-in is sequentially A, B. ', C
By replacing it with ``...'', you can see the type of content that should be lead-in during the operation, for example, 123.
When you operate X34÷ and there is a visitor and you want to leave it as is and return to your seat and continue the operation, the operator knows in advance that 7 corresponds to C because the formula display is AXB÷. Since there should be one, there are advantages such as being able to immediately lead in 7.

Alternatively, it may be simply set as 123X34÷7+3, which is NXN÷N+N.

In this case, you can check the function and see how far it has been operated.

In other words, when it is 123X34, it becomes NXN and 123
Since X34÷ is NXN÷, it is possible to clearly inform the operator how far the operation has progressed.

The present invention has been made in view of these points, and its feature is that when displays corresponding to numeric keys and function (calculation instruction) keys are displayed consecutively in the order of key operations, the numeric keys The purpose of this is to display numerical values input in correspondence with symbols such as specific characters, symbols, codes, etc., that is, to display consecutive numerical keys only once.

For example, when operating the keys for ``■■■'', the consecutive numeric keys ``Country'', ``Figure'', and ``■'' may be displayed only once, for example, as "'A".

Another method is to change the symbols (characters, etc.) corresponding to the numerical keys in relation to the operation of the function keys.

Furthermore, it is an object of the present invention to provide a display method that can display data (data display) such as lead-in data or calculation results in a conventional manner, and can also be combined with the display method (mathematical expression display) of the present invention.

Furthermore, it is an object of the present invention to provide a system in which display of mathematical formulas and display of data such as lead-in data or calculation results can be switched by using a desired switching means such as a key.

Further objects and features of the present invention will become clear from the following description along with the drawings showing one embodiment thereof.

Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 1 shows an external view of the main parts of a computer that employs the display method of the present invention, and is particularly for explaining the display section.

In the figure, 1 represents the main body, and 2 represents the display section. This display section is formed into a two-stage display, the upper row 2a is a mathematical formula display section, and the lower row is a data display section. At least the upper row is a dot matrix display, and the lower row is a dot matrix display. or consists of segment representations.

FIG. 2 shows an example of a control block circuit for realizing the display method of the present invention. In the figure, X is a normal data register and Y is a formula writing register according to the present invention.

Binary code information is stored in these X and Y, and circuits DRX and DR perform code conversion and desired display driving.
It is displayed by display bodies DSPX and DSPY via Y.

SHLGjXtY This is a circuit to shift the contents of each register to the left by one digit, and ICX and ICY are
In the input control circuit of , the first digit of X and Y
1 includes a control circuit that inputs input data.

B1 and B2 are buffer registers for storing one-digit information, and are circuits for incrementing the contents of the CULi buffer B2 by one.

Also, in the input control circuit of the ICI]1 buffer B2, a specific code CA (in this case, it is a code corresponding to the character "A").

) is a circuit for inputting. In addition, A, B, C...
The codes corresponding to the character "A" are incremented one by one based on the character "A".

KU is a key unit consisting of numeric keys and function keys, JK is a digital circuit that determines whether a key has been pressed, A and B are conditional flip-flops, and are composed of RS type F/F. As will be described later, F/FA determines whether or not a numeric key has been pressed before, and F/FB determines whether or not this is the first numeric key.

JA and JB are judge circuits that judge the contents of flip-flops A and B, and 2 to 0 are control signals.

The order in which these control signals are output and the operations to be performed will be explained below with reference to FIG. 2 and the flowchart of FIG. 3 showing the control procedure.

In FIG. 3, when a key is first pressed, the encoder EC performs code conversion, and the code is stored in the information storage buffer register B.

It is determined in step n1 whether a key has been pressed, and whether or not this is a numeric key is determined in step n2.

If it is a numeric key, the X register is shifted to the left at step n3, and then the numeric key code input at that time is input from buffer B1 to the first digit X1 of the X register at step n4.

n3 and n4 are steps for sequentially inputting numerical values to the X register.

Since the conditional F/F A Gj has been reset first, the process advances from step n5 to n6.

Since F/FB is also reset at first, step n7
Proceed to.

Step n7 is performed as an initial control when opening the koji for a series of calculations. In order to display the first lead-in as the symbol "A", for example, the code CA corresponding to A is changed to B2. Enter it in.

In other words, the buffer register B2 has 4 buffer registers as shown in FIG.
It is made up of bits, and if code A is oooo, the codes A, B, C, D, etc. will be as shown in the table below.

? In other words, each time the buffer register B2 is counted up by the count-up circuit CU, the code in the buffer B2 changes as follows: A-)B-)C→...

For example, 0000, 1101, 0001.
, 1100, 0010, 1111, 0011 are input, AXB+C+D is displayed.

In this way, in steps nl and n11, the code "CA" is input into the first digit of the Y register.

Conditional F/FA is set in order to maintain the contents of the Y register by subsequent numerical keys.

In other words, the F/FA is set by the control signal ■.

If you continue to press the numeric key, step n1→n2→n
The process advances from 3 to n4 and the numerical value is read into the X register, but since F/FA is set at step n5, the process returns to step n1 again.

In other words, the contents of the Y register are maintained. Next, for example, when the multiplication key is pressed, the process advances to steps n1→n2→n13.

Step n13 judges the type of function,
This is for controlling according to the function.

In other words, the processing circuit CAL of n13 proceeds to "18" only after processing by pressing the operation start key or the fourth clear key, but otherwise proceeds to step "14".

Figure 5 shows the required parts in the known processing circuit CAL. It includes a key judge circuit JCL (see FIG. 2).

Further, returning to FIG. 3, after the Y register is shifted to the left by one digit at "14", the contents of the buffer B1 are input into the first digit Y1 of the Y register at n15.

At this time, if the multiplication key is pressed, the buffer B1 contains the code corresponding to the multiplication key as described above, so this code is stored in Y1 of the Y register.

In this state, the display on the display body DSPY becomes AX.

Since the conditional F/FA is reset and B is set in steps n16 and n1, the next time you press the numeric key, it will proceed as n1 → n2 → n3 → n4 → n5 → n6''n8. O Step n8 will be skipped. Add 1 to Nofa register B2, that is, execute the process of counting up the contents of B2, and the code corresponding to symbol "A" is now input to B2, and ?2+1 here is the code system described above. This means changing to the code corresponding to the symbol "B".

Then, in steps n1o and n11, the code of buffer B is put into Y1 of the Y register.

Therefore, at this point, the display body DSPYlj A
It is displayed as B.

The F/FA set in step n1 prepares for the subsequent numeric key press processing.

In this way, the operations are performed sequentially, and if the calculation result is obtained using the eye key, the process proceeds to step n18, where the F/FA is reset, and at n19, the F/FB is reset, and these are also set to the initial state.

Therefore, if the numeric key is pressed next, the code of symbol "A" will be entered into buffer B2 again as a new arithmetic operation.

In the manner described above, a display method using mathematical expressions can be realized.

Furthermore, FIG. 6 shows another embodiment, and is a partial block diagram in which all numerical values are expressed by the same symbol, for example, "N". In this case, buffer register B in the flowchart of FIG. It will be readily understood that this can be achieved by removing the associated controls.

Then, the code input to the buffer B2 in step n7 may be a code corresponding to the symbol "N".

In the above embodiment, a case has been described in which numerical values are displayed using alphabetic characters, but the present invention is not limited to these, and it goes without saying that specific symbols such as O, #, etc. may also be used.

FIG. 7 shows still another embodiment, and shows a block diagram of the main part in which display of mathematical formulas and display of data such as lead-in data or calculation results can be switched by using a switching means such as a desired key, A dot matrix display is used to display one display and switch between them.

As shown in the figure, the control is performed by inputting the contents of the X and Y registers to the DR including a character generator (decoder) and a display adaptation signal circuit via a switching gate circuit G linked to a selection switch KS, and then inputting the contents of the Kusu display body DS
Display as P.

For example, this can be achieved by transmitting the contents of the Y register to the drive circuit DR and displaying the formula on the display device DSP only when KS is pressed.

As explained above, according to the display method of a calculator, etc. of the present invention, a predetermined numerical value input using a numerical key is displayed in correspondence with a specific symbol, so that the function key can be operated without making mistakes. This has the effect that it is possible to check whether or not the display is accurate, and that the display capacity is small, making it possible to downsize the device.

[Brief explanation of the drawing]

Fig. 1 is an external view of the main parts of a computer that adopts the display method of an example of the present invention, Fig. 2 is a block diagram of an example of realizing the same method, and Fig. 3 is a flowchart for controlling the same block. , FIG. 4 and FIG. 5 are diagrams for explaining FIG. 2, FIG. 6 is a flowchart of main parts showing another embodiment of the display method of the same invention, and FIG. 7 is a diagram showing still another embodiment of the display method of the same invention. FIG. 2 shows a block diagram of main parts for showing an embodiment of the invention. In the figure, 1: Main body, 2: Display section, X: Data register, Y
: Formula storage register, DRX, DRY: Code conversion and display drive circuit, DSPX, DSPY: Display body, SHL:
Shift circuit, ICX, ICY: input control circuit,
B1, B2: Information storage buffer, CU: Count up circuit, ICB: Input control circuit, KU: Key unit, JA, JB, JK, JT: Judge circuit, A,
B: Conditional F/F, ■~0: Control signal, KS: Select switch.

Claims (1)

[Scope of Claims] 1. In a display device such as a calculator, which has numeric keys and calculation instruction keys, and is configured such that a display according to a mathematical formula can be obtained by key operation of the numeric keys and calculation instruction keys, A character generator for generating character code signals such as , symbols, codes, etc. is provided, and the operands or operands input by key operations of the numeric keys are converted into predetermined values corresponding to the character code signals generated from the character generator. A display method for computers, etc., which is equipped with code conversion means for converting into characters and displaying them.