JP2000180880A - Display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily watch a longitudinally duplexed character without the sense of incompatibility. SOLUTION: Concerning the shape of a pixel G on a display device for displaying character on a dot matrix using a liquid crystal, since the conventional aspect ratio thereof is 1:1 and the aspect ratio of a longitudinally duplexed character is 2:1, the sense of incompatibility of longitudinal flatness is felt and further reading is difficult. By making the shape of the pixel G into laterally long rectangle having a lateral dimension larger than a longitudinal dimension, however, the ratio of the lateral dimension of a character displayed while being longitudinally duplexed to the longitudinal dimension thereof is increased and the flatness in the longitudinal direction of the character displayed while being longitudinally duplexed is suppressed. Thus, the character string displayed while being longitudinally duplexed can be easily watched without the sense of incompatibility.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display device for displaying characters by a dot matrix using liquid crystal.

[0002]

2. Description of the Related Art Conventionally, a display device used for office equipment such as a slip issuing machine only needs to be able to display input data and operation status. A display device having a smaller display screen size and coarser pixels than a display device used is used. Further, in a monochrome display device, when a certain character string is to be emphasized on the display screen, the character string is enlarged and displayed.

In recent years, in a display device having a fine pixel used in a personal computer or the like, it is possible to arbitrarily set a character size by using dedicated software pre-installed in the personal computer or the like. However, a display device used for office equipment such as a slip issuing machine has coarse pixels, so that it is difficult to display characters of various sizes. In addition, the function of displaying characters of various sizes is not suitable for the intended use of office equipment, for example, for a slip issuing machine, for printing predetermined contents on an existing invoice or delivery note. Because there is nothing to do, to simplify the operation,
Further, such a function is not required to reduce costs.

Therefore, in office equipment such as a slip issuing machine, double-width display is used as an enlarged display, and since the screen is small, the number of display characters is not reduced as much as possible even when the enlarged display is used. Vertical double display is more often used than quadruple display in which both the vertical and horizontal are doubled.

[0005]

Heretofore, in a liquid crystal display device using a dot matrix used for such office equipment, it is known that a pixel has an aspect ratio of 1: 1 or an elongated shape.

Here, a character displayed by a pixel g having an aspect ratio of 1: 1 (see FIG. 4) has an aspect ratio of 1: 1 in a standard character font display (see FIG. Display (Fig. 5
In (b), the aspect ratio is 2: 1. The characters that are displayed in a vertically doubled state are inconvenient in that they are elongated in the vertical direction, are difficult to read, and give a sense of incongruity. This inconvenience becomes more remarkable in a display device having a vertically long pixel.

SUMMARY OF THE INVENTION It is an object of the present invention to enable double-height characters to be recognized without discomfort.

Another object of the present invention is to make double-width characters easy to see.

[0009]

According to a first aspect of the present invention, there is provided a display device for displaying characters by a dot matrix using liquid crystal, wherein a pixel has a horizontally long rectangle having a horizontal size larger than a vertical size. It is.

Accordingly, the ratio of the horizontal size to the vertical size of the double-width character is increased, and the vertical extension of the double-width character is suppressed.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of a display device according to the present invention will be described with reference to FIGS. First, FIG.
FIG. 1 is a block diagram showing an electrical connection of each unit included in a slip issuing machine provided with a display device 1 of the present invention. The slip issuing machine is a device that prints a predetermined content on an invoice or delivery note in an existing format based on input data.
Such a slip issuing machine is provided with a display device 1 for displaying input data and operation status.

First, the slip issuing machine includes an engine board 2 for controlling each unit other than the printer, and a printer board 3 for controlling the printer.

The engine board 2 includes a CPU 4 for executing various calculations and centrally controlling each unit.
A bus line 7 connects a ROM 5 for storing various programs and an SRAM 6 for temporarily storing various variable information. The CPU 4 also has a dictionary ROM 8, a keyboard 9,
FD controller 11 for writing and reading data to and from floppy disk 10, interface 12, VR
An AM 13, an LCD controller 14 to which the display device 1 is connected, and a display character generator 15 are connected.

In the SRAM 6 and the VRAM 13, batteries 16 and 1 are provided for backup when the power is turned off.
7 are provided.

On the other hand, the printer board 3 also has a CPU 18 which has a flash ROM 19 and an SRA
M20 is connected to the bus via a bus line 21. Also,
The CPU 18 is connected via a bus line 21 to a kanji character generator 22 for printing, an ANK character generator 23, and a gate array 24 for performing various controls such as a print head and a sensor. Gate array 24
Is provided with a non-volatile memory 25, and an SRAM
The battery 20 is provided with a battery 26 as a backup power supply.

The engine board 2 and the printer board 3 are connected by a communication line.

The display device 1 is a liquid crystal display device that displays characters by a dot matrix using liquid crystal. The shape of the pixel G is a horizontally long rectangle having an aspect ratio of 1: 1.15 as shown in FIG. is there.

Here, in the present embodiment, the horizontal dimension of the pixel G is made equal to the horizontal dimension of the conventional pixel g (see FIG. 4), and the vertical dimension is made smaller than the conventional vertical dimension, thereby obtaining the pixel G.
Is set to 1: 1.15. Therefore, if the size of the display screen of the display device 1 is the same as that of the related art, the number of display lines becomes 1.15 times. Alternatively, if the number of lines displayed on the display screen is the same as the conventional one, the vertical dimension of the display screen can be reduced to 1 / 1.15, and the same number of lines can be displayed on the small-sized display screen.

In such a configuration, data input by the operator by operating the keyboard 9, data read from the floppy disk 10, data fetched from outside through the interface, and the like are displayed on the display screen of the display device 1. Will be displayed.

Image data displayed on the display screen of the display device 1 is developed in the VRAM 13. And VRAM
An image display signal is sent from the LCD controller 14 to the display device 1 in accordance with the image data developed on the LCD 13. Then
The display device 1 selectively opens a liquid crystal shutter (not shown) arranged in a matrix, whereby the image data developed in the VRAM 13 is displayed on the display device 1. At this time, since the aspect ratio of the pixel G shown in FIG. 2 is 1: 1.15, the standard character font display (see FIG. 3A) is a horizontally long rectangle of 1.15 horizontal to 1 vertical. It is.

By operating the keyboard 9, the operator can display a part or all of the displayed characters in a vertically enlarged manner. The vertical double display (refer to FIG. 3B) is 1.15 horizontal to the vertical 2 and compared to the conventional vertical double display (refer to FIG. 5B) having an aspect ratio of 2: 1.
Elongation in the vertical direction is suppressed.

When the operator requests issuance of an invoice or delivery note, a print command is transmitted from the engine board 2 to the printer board 3 and the operator selects one of the existing invoice or delivery note formats. According to the format, predetermined contents based on the data are printed on an existing invoice or delivery note.

According to the present embodiment, by making the shape of the pixel G of the display device 1 horizontally long, it is possible to make the vertical double display easy to see.

In the present embodiment, the aspect ratio of the pixel G is set to 1: 1.15. However, in the embodiment, even if the aspect ratio is not 1: 1.15, the pixel G is displayed in a standard character font display. If the characters do not become difficult to see,
May be made smaller in the ratio of the vertical dimension to the horizontal dimension.

[0025]

According to the first aspect of the present invention, the shape of the pixel of the display device which displays characters by the dot matrix using the liquid crystal is made into a horizontally long rectangle having a larger horizontal dimension than a vertical dimension. Since the ratio of the horizontal dimension to the vertical dimension is increased, and the vertical extension of the character displayed in the vertical magnification is suppressed, the character string displayed in the vertical magnification display can be easily viewed without discomfort.

[Brief description of the drawings]

FIG. 1 is a block diagram of a slip issuing machine using one embodiment of a display device of the present invention.

FIG. 2 is an explanatory diagram showing a shape of a pixel of the display device of the present invention.

FIG. 3 is an explanatory view showing a standard character font display and a vertical double display.

FIG. 4 is an explanatory diagram showing a shape of a pixel of a conventional display device.

FIG. 5 is an explanatory diagram showing a standard character font display and a vertical double display.

[Explanation of symbols]

 1 Display device G pixel

Claims (1)

[Claims] 1. A display device for displaying characters by means of a dot matrix using liquid crystal, characterized in that the shape of each pixel is a horizontally long rectangle whose horizontal dimension is larger than its vertical dimension.