JPS6131885B2 - - Google Patents

Abstract

PURPOSE:To increase a processing speed while performing easy-to-see printing with aligned decimal-point, by starting the printing of an integer part when the input of a decimal-point key is entered. CONSTITUTION:First, a numeric key K8 is pushed and a control key KD is then pushed. As a result, an 8 is stored in the latch L in a CPU and the point position of a decimal point is set at the 8th digit from the left margin of a printing form P. With a numeric key K1 pushed, a 1 is stored in a register KR and with a K2 depressed, a 2 is also stored in the KR to display a 12 on a display device DSP. Simultaneously, the frequency 2 of the depression of numeric keys is stored in a counter C. When a decimal-point key KP is pushed, the CPU substracts the numeral 2 in the 6th digit from the left margin to start printing operation. During the printing operation, numerals 3 and 4 following the decimal point may be inputted.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electronic device with a printing device, and more particularly to an electronic device that can improve printing processing speed and print in an easy-to-read format.

In conventional electronic desk calculators with printing devices, the last numeric key including the decimal point key is input when in the number entry mode, and the next control key such as the "+" key is pressed to input the entire operand. It was printing numerical information.

Therefore, it took time to print all the numerical information.

In view of the above-mentioned difficulties, the present invention starts printing the integer part when the decimal point key is input without waiting for the input of the control key, and it is possible to scale the integer part by inputting the decimal point key. The integer part is scaled and printed. As a result, the integer part is printed while the numeric information below the decimal point key is being input using the numeric keys, reducing processing time.Also, the printed numbers can be quickly viewed with scale, reducing operational errors. Furthermore, when a printing error is discovered, unnecessary key input after the decimal point can be omitted, which is extremely desirable.

FIG. 1 is a block diagram of one embodiment of the present invention. The keyboard KB has numeric keys K0 to K9, decimal point key K _p , slide switch SS to select whether to set the scale with a blank (blank digit) or to print a specific symbol (,) in the blank digit, and fixed decimal point position. control keys that give instructions to print
KD and other control keys (not shown) are provided. KR
is a register that stores key information from the keyboard KB, DSP is a numeric display, CPU is a central processing unit, PRT is a printing device, and serial print head H
It moves from left to right on the printing paper DP to perform printing. FIG. 2 is an example of printing, and FIGS. 3A and 3B are transition diagrams of display and printing, and the operation will be explained according to this example.

First, when the numerical key, for example K8, is pressed and the control key KD is pressed, "8" is stored in the latch L in the CPU, and the printing position of the decimal point is set at the 8th digit from the left end of the printing paper P.

Press the numeric key K1 and the number ``1'' will be registered.
It is stored in KR, the number "1" is displayed on the display DSP, and then when K2 is pressed, the number "2" is also registered.
It is stored in the KR, and the numerical value "12" is displayed on the display DSP as shown in Fig. 3. Printing is not done yet.

Further, a two-digit number of presses "2" is stored in a counter C that stores the number of presses of a numeric key. Decimal point key KP
When is pressed, the CPU subtracts the contents of the counter C, ``2'', from the value ``8'' stored in the latch L, calculates the subtraction result ``6'', and moves the print head H from the left edge of the printing paper. Move to the 6th digit position and print the number "1" at that position, then press 1 to the right.
Shift the digit to print the number "2", then move one digit to the right and print the decimal point ".". During this printing, as shown in FIG. 3, the number "34" below the decimal point can be entered using the numerical keys, and is displayed on the display DSP. When a certain control key is subsequently pressed, the print head H moves to the right one digit at a time, and the numerical values "3" and "4" are printed in sequence. During this time, numerical key input for printing the next line is possible. Also, at this time, the contents of counter C are cleared, but the contents of latch L, "8", are saved. When the printing of the numerical value "34" is completed, the printing paper P is fed one line by a paper feeding means (not shown) to move the printing position from the third row to the fourth row in FIG. H waits for the next print. Next, enter the numerical information "123456" to be printed using the numerical keys K1 to K.
When input using 6, it is displayed on the display DSP via the register KR as before, and the counter C is counting "6". Press decimal point key KP
The CPU knows that the counter C counts and stores "6" and that it can be scaled, so it adds "1" to the counter C to make it "7" and then sets the contents of the latch L as before. The content "7" of the counter C is subtracted from "8" to calculate the result "1". As a result, the print head H starts printing from the left end of the print paper. Also, at this time, the CPU is turned on by the slide switch.
The state of SS is detected, and since SS is set to blank in the case of FIG. 1, printing is performed in the same manner as in the previous example with the scale digit blank as shown in FIG. Numerical key input, printing, and change operations below the decimal point are all the same as before.

Furthermore, if the slide switch SS is set to ``,'', a scale symbol will also be printed, as in the printing example of 7'654.321 in FIG.

As mentioned above, in electronic devices, the integer part with scale is printed immediately when the decimal point key is pressed, so there are fewer operational errors, and an easy-to-read print format with aligned decimal point positions is obtained, and the processing speed is improved, so it has a wide range of applications. It is suitable for a wide range of applications such as electronic typewriters.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing one embodiment of the present invention;
Figure 2 is an explanatory diagram showing an example of the printing, Figure 3 A and B
is an explanatory diagram showing the transition of display and printing. K0~K9...numeric keys, KP...decimal point key,
PRT...Printing device, CPU...Central processing unit.

Claims (1)

[Claims] 1. An input means (KB) capable of inputting numerical information including a decimal part, a printing means (PRT) that prints numerical information, and a storage means ( KR), a setting means (KD) that presets the printing position of the decimal point included in the numerical information, a detection means (CPU) that detects the input of the decimal point included in the numerical information input by the input means, and the detection means When detecting input of a decimal point by the input means, derive a print start position of the integer part of the numerical information stored in the storage means based on the print position of the decimal point set by the setting means; An electronic device comprising a control means (CPU) for controlling the printing means to start printing the integer part from this printing start position, 2. The printing means has a movable printing section. death,
2. The electronic device according to claim 1, wherein the control means controls movement of the printing section.