JPH01229294A - Electronic equipment - Google Patents

Abstract

PURPOSE:To make a display easy to read and to prevent data from being misread by providing a display device with a means which displays unit points at every prescribed digit when numerical data is displayed in notation other than decimal notation. CONSTITUTION:Data inputted on the keyboard of, for example, a function electronic calculator or its arithmetic result is converted in format between the binary notation, and decimal notation and hexadecimal notation and displayed on a display part 2. For binary representation, a unit point display part 22 is used to display unit points 22'. In other way, a decimal point display part 22 is used to display unit points 22''. A code 24' is a display graph indicating the binary display mode and displayed by using a flag display part 24. Thus, the unit points are displayed and then while the number of digits is easily grasped, the display is easily read and rereading in the hexadecimal notation is facilitated.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to electronic equipment, and particularly to electronic equipment having a display that displays multi-digit numerical data.

[Prior Art] Conventionally, electronic devices such as electronic desk calculators (hereinafter referred to as calculators) have used Japanese segment LCDs and LED displays to output data. This type of electronic equipment is becoming more and more sophisticated, and so-called scientific calculators have a
Devices that convert data between base numbers and binary, octal, and hexadecimal numbers are also known.

[Problems to be Solved by the Invention] When converting between decimal numbers and binary, octal, hexadecimal numbers, etc. as described above, especially when converting from decimal numbers, it is necessary to display the Japanese character segment on the display. For example, in binary output, "1", rOJ
A large number of digits are output.

However, in the past, it was difficult to read the scale in this type of output display, and reading errors were likely to occur. Particularly in binary output, numbers other than "1" and rQJ are not output, so skill is required to read them without errors.

The object of the present invention is to solve the above problems and to make it possible to easily read numerical values even in numerical representations other than decimal numbers.

[Means for Solving the Problems] In order to solve the above problems, in the present invention, numerical data is displayed in an expression other than decimal in an electronic device having a display device that displays multi-digit numerical data. According to the above configuration, the output of the scale points makes the display easy to read even in numerical expressions other than decimal numbers. can do.

[Example] Hereinafter, the present invention will be described in detail based on the example shown in the drawings.

FIG. 1 shows the top surface of a scientific calculator as an example of an electronic device employing the present invention. As shown in the figure, a display 2 such as an LCD and a keyboard 3 are provided on the top surface of the main body of the apparatus. The keyboard consists of a large number of key arrangements, but they are the same as before, with the number pad part 35,
It is divided into a function key part 36 and a four arithmetic operation key part 37. The function keys 36 include a mode key 34, which allows the function keys 36 to perform trigonometric functions, factorials, and many other types of functional operations.

This mode key 34 is used to switch between a number of operation modes by pressing it in combination with a numeric keypad. In this example, "1" indicated by the symbols 31 to 33,
By pressing it in combination with the ``2'' and ``4'' numeric keys, the display format can be switched to decimal, binary, or hexadecimal, respectively.

FIG. 2 shows the structure of the display 2 shown in FIG. As shown in the figure, the display 2 includes a 10-digit numerical value display section 21 based on the Japanese character segment, a decimal point display section 22 provided for each digit of this numerical value display section 21, and a scale point display section 23. It is being Furthermore, approximately one flag display section 24 is provided above each digit to indicate the operating mode of the device. This flag display section 24 is conventionally known, and for example, "
Flags such as "DEG", rRADJ, and rGRADJ indicate the display mode when displaying the angle.

FIG. 3 shows the structure of the control system of the apparatus shown in FIG.

Input/output processing by the keyboard 3 and display 2 is controlled by the control unit 1. The keyboard 3 has a matrix signal line 5o for detecting the operation of each key in FIG.
-39, and has a key matrix 30 of CO to C4. Input data from this key matrix 30 is input to the control unit l via the data bus DBI.

The control unit 1 is composed of, for example, a one-chip LSI, and includes a CPU II and a ROM 12 that stores programs.
, R used as a work area during arithmetic processing, etc.
It consists of an AM 13 and a display driver 14 for controlling the display of the display 2. Display 2 is connected to display driver 14 via data bus DB2.

Next, the operation in the above configuration will be explained. In this embodiment, when data input from the keyboard 3 or calculation results are displayed and output, the display format can be converted between decimal, binary, and hexadecimal. At this time, scale points are displayed for each predetermined digit in order to make the output display easier to read.

FIG. 4 shows a display control procedure stored in the ROM 12 and executed by the CPU II. In the procedure shown in FIG. 4, flags indicating the mode setting state, key operation state, etc. are set as described later, and these flags are set in the internal register of the CPU II or in a predetermined storage area of the RAM 13. .

In step S1 of FIG. 4, the display on the display 2 is cleared, and a flag FD specifying 1O base number representation is set to select decimal number representation as the default number representation.

In the loop of steps S2 to S4, key human power is applied. First, in step S2, a key input is waited for, and then in step S3, it is determined whether the mode key 34 has been pressed. When the mode key is pressed, a flag FM indicating the pressing of this key is set in step S4, and the process returns to step S2.

If a key other than the mode key is pressed in step S3, the process moves to step S5, and it is determined whether a numeric key (numeric keypad) has been pressed. If the numeric key is not pressed, processing such as functional calculation is performed in step S6, and the process returns to step S2.

In step S7, it is determined whether the mode key is pressed. As mentioned above, to switch the display mode to decimal, binary, or hexadecimal, press key 3 on the numeric keypad.
1 to 33 are pressed. If the mode key has not been pressed, the answer to step S7 is negative, and the process proceeds to normal arithmetic processing in step S6.

Mode key and keys 31 to 33 (“1”,
If "2", "4") are pressed consecutively, step S
Proceed to step 8. In steps S8, S14, and S20, the pressed keys are "1" and "1" corresponding to the numbers 31 to 33 in FIG.
It is determined whether the key corresponds to either "2" or "4". If each step is affirmed, step S
9, proceed to S15 and S21. If step S20 is negative, the process proceeds to the processing routine set by the combination of other numeric keys and mode keys.If the "1" key 31 is pressed, first, in step S9, a flag indicating the decimal number display mode is flagged. Determine whether FD is set. If this flag is set, the process directly proceeds to normal display processing in step S13. On the other hand, flag FD is not set (binary, 1
If a display mode such as hexadecimal is set), the process moves to step S10 to set flag FD, and clear flags FB and FH indicating binary display and hexadecimal display, respectively.

Next, in step Sll, predetermined parameters are set in the display driver 14 and the like to perform decimal display, and the current display mode can be displayed by the flag 24 in FIG.

In step S12, internal binary data or display data that has already been converted into binary or hexadecimal is converted into a decimal format, and the process proceeds to step S13 for display processing. As a result, data is displayed on the display 2 in decimal notation. In that case, the decimal point, scale point, etc. are displayed as before. In step S13, a flag FM indicating mode key operation is reset.

If the key 32 corresponding to "2" is pressed in step S14, it is determined in step S15 whether the flag FB indicating the binary number display mode is 1 or not. If the binary number mode is not set, the process moves to step 316, and if the binary number mode is set, the process moves to step S19.

At step 316, similarly to step SIO, flag FB indicating binary mode is set, and flags FD and FH indicating decimal and hexadecimal display are reset. Step S1
In step 7, the display flag 24 and the like are set via the display driver 14, and in step 518, the data is converted into binary numbers.

In step S19, when outputting display data consisting of an enumeration of "l" and rOJ, scale display is performed every four digits.

For example, as shown in FIG. 5A, a scale point 23' is displayed for every four digits using the scale point display section 23 of FIG. Alternatively, using the decimal point display section 22, as shown in FIG.
The scale point 22' is displayed as shown in FIG. Note that in FIGS. 5A and 5B, reference numeral 24' is a display flag indicating the binary display mode, which is displayed using the flag display section 24 of FIG. 2.

FIG. 5 shows the case where the decimal number r321J is expressed in binary number. When scale points are displayed as shown in FIG. 5, it is easy to grasp the number of digits, the display is easy to read, and it is very easy to convert to hexadecimal numbers. Hexadecimal numbers consist of a 4-digit binary pattern and a hexadecimal number 1.
It is known that by memorizing the combination of digits, it is easy to convert to hexadecimal numbers, but if you display scale points for every 4 digits as shown in Figure 5, you can easily convert to hexadecimal numbers. Rereading can be done very easily. Fifth
In the case of the figure, if the binary number is read as a hexadecimal number, r141J
becomes.

When it is confirmed in step S20 that the key 33 corresponding to "4" has been pressed, it is determined in step 321 whether a flag FH indicating hexadecimal display mode is set. If it is not the hexadecimal mode and this flag is not set, steps S22 to S24 set the mode of the test tube 5io-si and convert the data to hexadecimal display, and proceed to step S13.

In this case, the numbers are "O" to "9", "A" to "F"
It is expressed by the characters. In the procedure shown in Figure 4, the scale is not displayed in the case of hexadecimal numbers, but in Figure 5 (A
), (B), the scale point may be output every four digits, for example. This makes it easier to read data, especially when the number of digits is large.

In FIGS. 5(A) and 5(B), an example is shown in which the scale is output using the scale display section and the decimal point display section.
As shown in fl, the flag display section 24 is connected to the numerical display section 21.
If a display flag 24' is provided for each digit, as shown in FIG. 5(C), a display flag 24' may be displayed for every four digits to indicate the scale position. With this, the fifth
The same effects as in Figures (A) and (B) can be expected.

Although the embodiment for a scientific calculator has been described above, it goes without saying that the same configuration can be implemented in a device that converts similar display formats, such as a computer system. Furthermore, in the case of binary representation, an example has been shown in which a scale point is output every four digits, but it goes without saying that the digit position of the scale point is not limited to this. For example, 2
In the case of a base number display, there is an advantage that it is possible to easily convert to an octal number by outputting a scale every three digits. Of course, it goes without saying that the same configuration as above is also possible in number representations other than binary, octal, and hexadecimal.

[Effects of the Invention] As is clear from the above, according to the present invention, in an electronic device having a display that displays multi-digit numerical data,
When displaying numerical data in a format other than decimal, the display device is equipped with means for displaying scale points at predetermined intervals. This has an excellent effect in that the display can be easily read and data can be prevented from being misread.

[Brief explanation of the drawing]

Figure 1 is a top view of a scientific calculator adopting the present invention, Figure 2 is an explanatory diagram showing the structure of the display in Figure 1, Figure 3 is a block diagram of the control system of the scientific calculator in Figure 1, and Figure 3 is a block diagram of the control system of the scientific calculator in Figure 1. Figure 4 is the third
Flow chart diagram showing the control procedure of the CPU in Figure 5.
Figures (A) to (C) are explanatory diagrams showing display states of the display. 1...Control unit 2...Display 3...Keyboard 11/CPU 12-ROM

Claims (1)

[Claims] 1) In an electronic device having a display device for displaying numerical data of multiple digits, when displaying numerical data in an expression other than a decimal number, the display device is provided with means for displaying scale points at every predetermined digit. and electronic equipment.