JPS59188481A - Printer - Google Patents

Abstract

PURPOSE:To relieve the user of labor such as movement of his eyesight lines and facilitate operation, by providing a display function on a paper bail so that a displaying position and an actual printing position are made proximate to each other. CONSTITUTION:When a character key provided on a keyboard 1 is depressed, a thermal head 3 provided on a carriage 2 melt an ink on an ink ribbon led between the head 3 and printing paper 5 wound around a platen 4, whereby the ink is transferred onto the paper 5, and an image is displayed on a liquid crystal display device 7 provided on the paper bail 8. The paper bail 8 is provided on a part directly above the head 3, and displays the characters printed on the paper hidden by the ink ribbon 6 and the head 3 and the position of a cursor. Accordingly, the displacement of the user's eyes is reduced, thereby enabling him to easily look and relieving him of fatigue, and even when the printing position and the printed characters are hidden by the ink ribbon, required information can be securely displayed to the user.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a printer equipped with a display device that can reliably display the printing position and status to the user even when the printing position and characters are not visible.

Prior Art In conventional printers equipped with print position display devices, the display position and the print position are significantly different from each other.

As a result, electronic typewriters, for example, have the disadvantage that shifting the line of sight between the display position and the printing position places a heavy burden on the user.

Furthermore, conventional thermal transfer type thermal head printers have drawbacks such as characters being hidden by the ink ribbon and not visible immediately after printing, and it is difficult to match the printing position with the display position.

Purpose The present invention has been made in order to eliminate the above-mentioned conventional drawbacks, and by installing a display function on the paper pail, the display position and the actual printing position are brought closer together, and as a result, the line of sight is improved. The purpose of the present invention is to provide a printer with a printing position display function that reduces the burden of movement and is configured to be easy for the user to use.

EXAMPLES Hereinafter, the present invention will be explained in detail based on examples shown in the drawings.

FIG. 1 shows the external appearance of a thermal transfer type thermal printer equipped with an LCD in the paper bail portion, which is an embodiment of the present invention.

By pressing a character key arranged on the keyboard 1, the thermal head 3 provided on the carriage 2 prints the image on the ink ribbon 6 guided between the platen 4 and the printing paper 5 wound thereon. The ink is dissolved and transferred to the printing paper 5, and displayed on an LCD (liquid crystal display) 7 placed on the paper pail 8.

The paper pail 8 is placed on the top of the thermal head 3 and is attached to the ink ribbon 6 and the thermal head 3.
Display characters on the paper and the cursor position that are hidden by

This allows the user to know the current printing status without having to move the ink ribbon or carrier.

On the back of LCD 7, there is a paper pail 8a in the original meaning.
is installed, so that the printing paper 5 is placed on the platen 4.
It is designed so that it can be wrapped tightly.

FIG. 4 shows an outline of the control circuit of the printing device of the present invention.

Information input and output by the MPU (processing unit) 9 is carried out via a data bus 10, and input information from the KCL (key control circuit) 11 is transferred to the ROM ('J-only memory) 12 and RAM ( Random access memory) According to the microinstruction information in 13,
It is sequentially controlled and output as digital information to IL (interface circuit) 14 and LCL (liquid crystal control circuit) 15.

A PCL (printer control circuit) 16 divides the digital information output from the IL (interface circuit) 14 into signals for the printer section and controls the signals.

A PD (printer driver) 17 amplifies control signals for each part of the printer obtained from a PCL (printer control circuit) 16 to a drive level for each part, and amplifies the control signals for each part of the printer to a driving level for each part, and amplifies the control signals for each part of the printer obtained from the PCL (printer control circuit) 16. It drives various drive devices such as PDM (paper (3) feed drive device) 19, Tl (HM (thermal head 1 drive device) 20, and CDM (carrier drive device)).

On the other hand, the LCL (liquid crystal control circuit) 15 refers to the signal from the MPU (arithmetic processing unit) 9 to the LCDCG (liquid crystal character generator) 22, etc., and controls each bit of the LCD' (liquid crystal display) 23 and each As digit driving information, L
Output to CDD (LCD driver 24°24).

A liquid crystal driver (LCI) 24 amplifies these signals to a level that drives the LCD 23.

Therefore, if the key labeled rIJ on keyboard 1 is pressed now, KCL (key control circuit) 11
converts this character signal into an arithmetic level in an MPU (arithmetic processing unit) 9.

The MPU (processing unit) 9 follows the microinstruction information and various code information in the ROM (read only memory) 12 and RAM' (random access memory) 13, and also reads the LCL (LCD
Control logic) 15 (4) is LCDCG (LCD character generator)
) 22, LCDD (LCD driver) 24
Then, each bit information is sent to display "1'" on the LCD 23. This character also serves as a cursor.

Since this embodiment is configured as described above, the amount of movement of the user's line of sight is small, making it easy to see and less tiring, and it can be used reliably even when the printing position and characters cannot be seen due to the ink ribbon. The effect is that necessary information can be displayed to the user.

In addition, in the above embodiment, the display contents of the LCD are as follows:
Although only a character cursor is displayed, various function commands such as centering indentation, or various positional information such as right margin, left margin, tab position, etc. may also be displayed. Needless to say, the scale itself of the carriage can also be displayed.

In addition, it is also possible to display the data while sequentially shifting the LCD by the necessary digits.

Further, the display device Tf is not limited to an LCD, and may be a display of other light emitting diodes or the like.

Effects As is clear from the above explanation, the present invention has the effect that various information during printing is displayed in a form that is much easier to see than in the past.

[Brief explanation of the drawing]

1 to 4 are plan views illustrating an embodiment of the present invention, and FIG. 4 is a control circuit diagram. 1 faction 1...keyboard 2...carriage 3.
...Thermal head 4...Platen 5...Print paper 6...Ink ribbon 7...LC
D (7) Figure 2 Figure 4 3

Claims (1)

[Claims] A printer having a printing platen and a paper pail for fixing printing paper, and a printing means that moves relative to the platen, characterized in that a printing position display means is provided on the paper pail. .