JPS5871168A - Electronics - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is characterized in that 1. a recording type electronic desktop calculator (hereinafter referred to as a recording type
With regard to printing methods such as tfiL), the printing is displayed in a special format for each multi-digit number, thereby making the recorded numbers easier to read, and is especially applicable to dot-type printing methods. It is suitable for

Most of the high-end recording calculators are constructed so that the scale of the numbers is displayed, making it easier for the user to see numbers with long digits. Figure 1 (4) and (B
) show examples of three-digit scales printed by such conventional recording calculators, and ω in Figure 1 shows one character space for every three digits of the number, and In FIG. 1(B), a dash symbol "1'" is added to the shoulder of the third digit instead of a space.

However, although it is easy to read when a space is provided between every three digits as in the first example, if you want to record a 12-digit number, for example, three extra digits are required for this scale. becomes. Note that the position indicating the scale here is not fixed, but can be moved depending on the position of the decimal point.

Therefore, it is necessary to provide an extra hammer or driver exit line for these three digits, and the horizontal dimension of the recording device is correspondingly thick (also, in the case of a recording device whose print head moves left and right) However, it is necessary to widen the horizontal movement width by three digits, and the recording speed also decreases by the amount of movement.In other words, this is a disadvantageous factor for recording calculators, which are expected to be compact recording devices. Become.

On the other hand, the method of providing a symbol every three digits as shown in Figure 1 (B) does not require any extra digits and therefore does not increase the cost, but it is difficult to read. There is a need for a scale system that does not affect costs (and does not cause a decrease in printing speed) and is easier to read.

The purpose of the present invention is to focus on such conventional problems,
For example, dot-type recording devices that do not require space digits (for example, display the number of digits that require a scale in different printing formats alternately, making it easy to read numbers without much increase in cost) The objective is to provide a suitable printing method.

The present invention will be described in detail below based on the drawings.

FIG. 2 shows an example of printing using the printing method of the recording device of the present invention. In this example, every three digits, the next three digits are recorded as darker numbers than the others. In other words, By printing in this way, the scale can be easily read without providing space digits.In addition, in the case of a type-type recording device, this type of printing method requires preparing two types of type or printing twice. It is necessary to change the impact force of the hammer or hammer, which increases costs and reduces printing speed. ,
The function of implementing such a printing method can be easily provided as described later.

Figure 3 (4) shows that when printing while moving the inkjet nozzle from right to left in the figure, the driving voltage marked 7IO on the printing nozzle is changed, and the dots of 3 digits are printed every 3 digits. ' to increase the apparent density above, thereby making it easier to read the numbers by creating a difference in density between the three digits before and after the numbers printed in normal density.

The 31st W (B) is designed to print while moving the inkjet nozzle, and then ejects double dots at the 3-digit number in the 3VT column, apparently increasing the above a degree. The same effect can be obtained as shown in FIG. 3 (4).

FIG. 4 shows an example of a control circuit that variably controls the driving voltage of the printing nozzle according to the printing method of the present invention as described above. Here, 1i6 and 2 are Zener diodes, 3 is a transistor, and the Zener diodes 1 and 2 are connected in series.
The collector of transistor 3 is connected to the connection point between 8 and 2, and the other end of Zener diode 1 is connected to the base of transistor 4. 5 is a counter, and its output S3 is supplied to a transistor 30 via an inverter 6. As shown in FIGS. 5(4) and 5(B), a digit pulse 81 and a decimal point reset pulse S2 are input to the counter 5 in response to the number and symbol of each digit to be printed.
Count 3 pulses Sl as decimal point position reference 3i
Then, the scale pulse S3 (level (5) in FIG. 9 is a capacitor for smoothing the DC voltage, lO is a smoothing capacitor for the nozzle driving voltage output VNN, and 11, 12 and 13 are resistors.

Now, if the decimal point reset pulse S2 is supplied to the counter 5, a scale pulse signal 5360" is supplied to the inverter 6 until the digit pulse S1 is counted 3. As a result, the base of the transistor 3 receives the signal S3. is input, the transistor 3 becomes conductive, and the diode 2 is short-circuited, so that the nozzle driving voltage VNN obtained from the transistor 4 is maintained at VNN 1 as shown in FIG. As long as the head is marked, the nozzles of the print head will emit dots of normal density.

Next, three digit pulse signals 81 supplied to the counter 5 are input, and when the three pulses are counted, the scale pulse signal S3 output from the counter 5 is inverted and becomes 1'', so it is Transistor (6) The signal Ω supplied to the base of transistor 3 turns off transistor 3 & (See Ll).

With the VNN increased to VNN 2 in this way, the print head ejects dots that are darker than the normal state, and as shown by the number "123J" in FIG. 3 (4), the apparent identification above is In this way, the numbers to be printed are alternately and repeatedly printed so that every three digits become a normal printing group and a dark dot printing group.

In addition, the printing method using 2i dots as shown in FIG. 3(B) can also be easily realized by electrical processing similar to that shown in FIG.

As explained above, according to the printing method of the present invention, the dots ejected from the print head at specific digits are controlled by a simple control circuit that alternately changes the voltage applied to the print head for each required number of digits. Since the shape is changed, there is no need for extra digits mechanically to provide space digits as in the past. can.

Note that the number of digits that change the printing format is not limited to the upper three digits, but can be any desired number, and the scale of the desired digit can be changed to the first digit or the last digit. It is also possible to express it by changing the shape of the dot for just one digit of the last digit.

[Brief explanation of the drawing]

FIGS. 1(A) and (B) are diagrams showing an example of printing a 3-digit scale on a conventional recording calculator, etc.; FIG. 2 is a diagram showing an example of printing a 3-digit scale using the printing method of the present invention; Third
Figures (G) and (B) are diagrams showing two sides of a multi-digit number printed by the printing method of the present invention, and Figure 4 is a circuit diagram showing an example of the configuration of a control circuit according to the printing method of the present invention. 5
Figures (4), (B), (C) and υ are the valley signal waveform diagrams. 1.2... Zener diode, 3, 4... Transistor, 5... Counter, 6... Inverter, 7... AC power supply, 8... Rectifier circuit, 9.10... Smoothing capacitor , 11, 12. 13・
··resistance. 38 Figure 3 (A) (B)

Claims (1)

[Claims] l) In a printing method that prints a multi-digit number in dots,
A printing method characterized in that for each required number of digits based on the decimal point, at least one digit is printed in a form that is distinguished from the digits of other digits. 2. In the printing method described in claim 1,
5. A printing method characterized in that the size of dots constituting at least one digit number is changed for every predetermined number of digits. 3) The printing method according to claim 1, wherein the number of dots constituting a small number (at least one digit) is changed for each predetermined number of digits.