JPH0725073A - Controlling method of portable terminal equipped with bar code printing function - Google Patents

Abstract

PURPOSE:To print bar code having a horizontally and perpendicularly correct white-to-black ratio by a method wherein the ratio of the number of dots under voltage is applied to that of dots under no voltage is applied is made to be (1:1) when bar code having the white-to-black ratio of 1:1 is printed horizontally to the feeding direction of paper, while the ratio of the paper feed of column under voltage is applied to that of column under no voltage is applied is made not to be 1:1 when bar code having the white-to-black ratio of 1:1 is printed perpendicular to the feeding direction of the paper. CONSTITUTION:At the printing of bar code having the white-to-black ratio of 1:1, the bar code having the correct white-to-black ratio can be printed by setting the ratio of the number of dots under the condition that voltage is applied to a line head 5 to that of dots under not voltage is applied to be 1:1, since no effect of heat inertia or the like is applied. On the other hand, if the bar code is printed perpendicularly under the condition that the ratio of the paper feed of column under the condition that voltage is applied to the line head 5 to that of the paper feed of column under no voltage is applied set to be 1:1, the percentage of black becomes higher under the effect of heat inertia, especially at a high printing speed. Thus, by decreasing the paper feed of the column under the condition that voltage is applied to the line head 5, the bar code having the correct white-to-black ratio can be printed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of controlling a portable terminal having a bar code printing function.

[0002]

2. Description of the Related Art An input device, a storage device for storing a character code, table data, a character font, a program, etc. input from the input device, and a display device for displaying the characters and storage contents input from the input device. In a table data processing device that is equipped with a control device that controls these devices and can arbitrarily draw the key line information regardless of the table format, when the column configuration is changed, the changed column is targeted and is drawn in the table. A technique for correcting the key line is known from Japanese Patent Application Laid-Open No. 2-18126.

[0003]

However, there has been no technique for controlling the printing of the bar code in the portable terminal so that the bar code can be printed correctly in both the vertical and horizontal directions. In the conventional method, when printing barcodes, if the dot control of the thermal printer is the same when printing horizontally in the paper feed direction and when printing in the vertical direction. When printed vertically, the proportion of black and white lines in the bar code becomes incorrect due to the effect of residual heat from the thermal head.

An object of the present invention is to control a printer so as to print a bar code having a correct black-and-white ratio when printing a bar code in the horizontal direction and in the vertical direction with respect to the paper feeding direction. It is to be.

[0005]

When a bar code having a black and white ratio of 1: 1 is printed horizontally with respect to the paper feeding direction by a portable terminal (an example of the state is shown in FIG. 3). The number of dots to which voltage is applied and the number of dots to which voltage is not applied are set to 1: 1 in the line head, whereas in the case of printing in the vertical direction (an example of the state is shown in FIG. 4), the line head The paper feed amount of the line to which the voltage is applied and the paper feed amount of the line to which the voltage is not applied are not 1: 1

[0006]

When a bar code having a black and white ratio of 1: 1 is printed, when the bar code is printed horizontally with respect to the paper feed direction, it is not affected by residual heat and so the voltage of the line head is applied. If the number of dots to be applied and the number of dots to which no voltage is applied are set to 1: 1, a bar code having a correct black and white ratio can be printed. However, in the case of printing a bar code in the vertical direction, the paper feed amount of the line to which a voltage is applied to the line head,
If the paper feed amount of the line to which the voltage is not applied is set to 1: 1 and the printing speed is particularly high, the black ratio is increased due to the influence of the residual heat. Therefore, by reducing the paper feed amount of the line to which the voltage is applied to the line head, it is possible to print a bar code having a correct black and white ratio.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows the configuration of an embodiment of the present invention. A portable data communication device according to an embodiment of the present invention includes a liquid crystal display unit 1, a keyboard unit 2, a microcomputer control unit 3, a memory unit 4, a line head 5, a drive unit 6 for driving thermal paper, and a line head 5. The line head controller 7 controls whether to apply a voltage to each dot.

A control method of the microcomputer controller 3 of the present invention will be described with reference to FIG. The type of bar code to be printed, the paper feed speed, the width and length of the bar code, and the paper feed direction are input from the keyboard unit 2 in advance by the guidance of the liquid crystal display unit 1 and stored in the memory unit 4 ( 8) Regarding the type of barcode to be printed, the ratio of black and white is 1: 1: 1: 1: 2: 1: 2: 3: 1, the paper feed speed is 5 lines / second, and the width of the barcode is When printing in the horizontal and vertical directions with respect to the paper feed direction, the minimum width is 4 dots and 4 lines, and the barcode length is 40 lines and 40 dots, respectively. When the bar code is printed, it is checked whether the bar code is printed horizontally or vertically (9).
If printing is performed in the horizontal direction, the black-and-white ratio of the type of barcode to be printed stored in the memory unit 4 is multiplied by the number of dots of the minimum width of the barcode, and the number of dots corresponding to the value is multiplied. As for the black portion, the voltage is applied, that is, the dots to which the voltage is applied and the dots to which the voltage is not applied are 4 dots, 4 dots, 4 dots, 4 dots, 8 dots, 4 dots, 8 dots, 12 dots and 4 dots. To control the line head controller 7. Next, the drive unit 6 is controlled to feed the paper by one line, and the line head control is repeated. By repeating the above operation for 40 lines, a predetermined barcode can be printed. (10) When printing in the direction perpendicular to the paper feed direction, the black-and-white ratio of the type of barcode to be printed stored in the memory unit 4 is multiplied by the number of lines of the minimum barcode width. Calculate the corrected value. The correction rate is determined by the printing speed and the heating and heat radiation characteristics of the thermal line head 5, and the microcomputer control unit 1 obtains the correction rate from the table in the program from the printing speed and sets it to 25%. The number of black lines multiplied by the correction factor is reduced, and the number of next white lines is increased by the reduced number of lines. Therefore, the corrected number of black and white lines is 3, 5
Rows, 3 rows, 5 rows, 6 rows, 6 rows, 6 rows, 14 rows, 3 rows. Next, in order to print black for the length of the bar code, that is, for 40 dots, the line head controller 7 is controlled so as to apply a voltage of 40 dots.

Next, the drive unit 6 is controlled to feed one line of paper,
The line head control is repeated. The above operation is repeated for the first number of black lines, that is, for three lines. Next, the drive unit 6 is controlled to perform line feed, and the line head control unit 7 is controlled so that the 40 dot voltage is not applied in order to make the 40 dots white. The above operation is repeated for the first number of white lines, that is, for five lines. A predetermined barcode can be printed by repeating the control according to the number of black and white lines corrected. (11)

[0010]

Since the correct bar code can be printed horizontally or vertically with respect to the paper feeding direction, the number of variations of the bar code that can be printed is increased, and the bar code can be created for various purposes.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention.

FIG. 2 is a flowchart showing a control method of the present invention.

FIG. 3 is a diagram showing a printing example in which a barcode is printed horizontally with respect to a paper feeding direction.

FIG. 4 is a diagram illustrating a printing example in which a barcode is printed vertically with respect to a paper feeding direction.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Liquid crystal display part, 2 ... Keyboard part, 3 ... Microcomputer control part, 4 ... Memory part, 5 ... Thermal line head part, 6
... line head drive section, 7 ... line head control section.

Claims (1)

[Claims] 1. A portable terminal comprising an input section, a display section, a drive section for driving a thermal line head, a thermal paper, and a line head control section for controlling whether a voltage is applied to each dot of the line head. When printing a bar code with a black-and-white ratio of 1: 1 when printing horizontally with respect to the paper feed direction, the number of dots to which the voltage of the line head is applied and the number of dots to which the voltage is not applied are set to 1: 1. On the other hand, when printing in the vertical direction, the paper feed amount of the line to which the voltage is applied to the line head and the paper feed amount of the line to which the voltage is not applied are 1: 1.
A method for controlling a portable terminal having a barcode printing function, which is characterized in that