JPH0444781B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a pattern output method and apparatus, and more particularly to a pattern output method in which an arithmetic expression is integrated with an output pattern and output.

Conventionally, to output a pattern of an arithmetic expression, such as a square root, on a calculator, etc., you need to enclose the usual calculation formula for which you want to calculate the square root in brackets, and then press the "√" key to output the square root calculation formula, that is, "√
” pattern is output. In addition, the output pattern is different from general mathematical formulas, making it difficult to see, and furthermore, there are disadvantages in that key operations are increased during input.

The present invention is proposed in view of the above-mentioned disadvantages of conventional input methods. That is, an object of the present invention is to propose a pattern output method that can output a pattern in a form similar to that of a commonly used mathematical formula and that can simplify key operations at the time of input.

Hereinafter, a detailed explanation will be given according to an example showing an example in which a calculation formula is included in the root symbol (√) of the square root.

1 which is a block diagram showing one embodiment of the present invention.
In the figure, K1 to K3 are input keys, K1 is the square root calculation key, K2 is the square root calculation cancellation key, and K3 is the square root calculation key.
is a group of operation keys, which is composed of numerical keys "0" to "9", function keys, and the like.

These input keys K1 to K3 are all connected to the central processing unit CPU for calculation. Keys K1 and K2 relating to square root calculation are connected to the set terminal S and reset terminal R of the set/reset flip-flop FF, respectively. The output terminals Q of the set/reset flip-flop FF are connected to character generators CG1 and CG2 via AND gates G1 and G2, respectively. The character generator CG2 receives an address signal of a numeric or character character code from the central processing unit CPU through an AND gate G2 and outputs a corresponding number or pattern in a 5x7 dot matrix. It is a device that generates patterns that are converted into evolutionary codes. On the other hand, the character generator CG1 has an address corresponding to the same numerical or letter character code as the character generator CG2, but the different configuration is that each pattern is located in the upper part of the 5x9 dot matrix. It has a topper " ^- " consisting of a 5x2 dot matrix, and outputs a 5x9 dot matrix of a pattern converted into a binary code. (See Figure 3). Furthermore, the character generator CG1 has a character "〓" for the radical symbol (see FIG. 2).

The patterns converted into binary codes generated by these character generators CG1 and CG2 are displayed on the display buffer DRAM (dynamic RAM).
is stored in The contents of this DRAM are displayed on the display.
There is a one-to-one correspondence with the DIS display. Display device DIS
is a device capable of displaying a 5×9 dot matrix of one character.

FIG. 2 shows an example of the correspondence between the addresses of character generators CG1 and CG2 and character patterns. In this way, with the character generator CG1
In CG2, the same character (number and symbol) pattern corresponds to the same address, but the pattern in CG1 has a dot bar " ^- ".

Furthermore, the final address END is "empty" in the Kirakuta Generator CG2, while "〓", which is part of the radical symbol, corresponds to the CG1.

Next, the operation of FIG. 1 will be explained based on FIG. 2.

Square root calculation key during calculation input or at the beginning
When K1 is pressed, that symbol is input to the set terminal of the set/reset flip-flop FF,
The same output terminal Q is ON and OFF. at the same time
The signal from K1 is also input to the central processing unit CPU, and the address of the first character "〓" (END address in Figure 2) to display the radical sign is sent to the CPU.
Input from address terminal A to two AND gates G1 and G2.

Since the Q terminal of the set/reset flip-flop FF is ON and the terminal is OFF, the CPU
The address signal from the output A of is input to the character generator CG1 via the AND gate G1. Then, the corresponding pattern will be output and OR
The data is written to the DRAM via the gate G3, and the first character "〓" in FIG. 3 is displayed on the display DIS. From now on, the calculation formula entered using calculation key group K3 is:
All are composed of characters with a top bar " ^- " generated by the character generator CG1 (from the 2nd character to the 10th character in Figure 3).

Next, when the radical cancel key K2 is pressed, the signal is input to the input terminal R of the set/reset flip-flop FF, and Q, is inverted. letter)
(11th to 13th characters in Figure 3).

Organizing the above key operations, the keys are K1,
5,+,2,×,(,4,+,2,),K2,+,2,=
This means that the keys were operated in this order. here,
K1 is the square root calculation key, and K2 is the square root calculation cancellation key.

By the way, in the above explanation, for square root calculation
We assumed two input keys, K1 and K2, but there is a known Toggle (T type) in which the output terminal Q is inverted every time an input pulse enters the flip-flop FF.
- If you use a flip-flop, as shown in Figure 4.
The K1 and K2 keys are combined into one K4 key, which simplifies the circuit diagram.In other words, it has the functions of K1 and K2.
When the K4 key is pressed for the first time, the output Q of the flip-flop FF is turned ON. AND gate G2
is closed because the output of the flip-flop FF is given, and the address signal generated by the CPU in response to the press of K3 is the character generator.
Only given to CG1. Next, when the K4 key is pressed, output Q turns OFF and turns ON, so
Only the character generator CG2 is accessed and the radical is removed.

In the embodiment described above, by preparing a part of the calculation formula as one with the number or symbol pattern, the key operation is to wrap the calculation formula for which you want to calculate the radical in brackets in advance and then press the square root key. You can avoid the above complications. Specifically speaking,
Radical calculation can be performed by pressing the calculation key and the square root calculation release key twice. Furthermore, it is possible to avoid the difficulty of displaying the square root symbol after the calculation formula enclosed in brackets, and to display the calculation formula within the radical symbol.

The present invention is not limited to the embodiments described above, but can output arithmetic expressions that require pattern output such as a top bar " ^- " or an underbar " ^- " with a small number of operations and in a format familiar to the general public. do.

For example, like 3√26, by pressing the division key after 3, then pressing the (2) and (6) keys,
The output pattern becomes 2, 6, which is combined with the previous division output pattern ")" to obtain the printed/displayed output of the completed arithmetic expression pattern.

According to the present invention, it is possible to output a symbol in a form that is easy to see and understand according to the character string to which it corresponds, and furthermore, the instruction operation for outputting this symbol is based on the character string to which it corresponds. Since it is performed prior to input, it matches the order in normal handwritten notation, and since it is the same method regardless of the final output form of this symbol, it is easy to understand and operate. It has an effect.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of an embodiment of the pattern output method of the present invention, FIG. 2 is a correspondence diagram showing patterns of character generators CG1 and CG2 in the same area, and FIG. 3 is an embodiment of the present invention. FIG. 4 is a block diagram showing another example of a pattern output method in which some keys are omitted from the block diagram shown in FIG. 1. . Here, K1 is a square root calculation key, K2 is a square root calculation cancellation key, and K3 is a group of calculation keys.

Claims (1)

[Scope of Claims] 1. A pattern output method for outputting symbols having properties that can correspond to character strings of various numbers of characters, the method comprising: instructing the output of the symbol, and then sequentially inputting characters to which the symbol corresponds. A pattern output method characterized in that each time the symbol is displayed, the symbol is formed in a form corresponding to the number of the characters, and is output together with the character. 2. A pattern output device that outputs a symbol that can correspond to a character string with a variable number of characters, including an instruction means for instructing the output of the symbol, and a device corresponding to the symbol instructed by the instruction means. an input means for inputting a character to which the symbol should correspond; and an output means for forming the symbol in a form corresponding to the number of characters and outputting it together with the character each time a character to which the symbol should correspond is inputted from the input means. A pattern output device comprising: