JPH05219286A - Display facsimile equipment - Google Patents

Abstract

PURPOSE:To provide the display facsimile equipment in which it is prevented that display with a different aspect ratio with respect to three kinds of read densities different from subscanning directions at a sender side results in illegible reading and the display area is reduced when facsimile reception data are displayed on the display device. CONSTITUTION:The size of one picture element of a display device 1 is selected to be 0.135mm in the lateral direction and 0.278mm in the longitudinal direction almost coincident with the aspect ratio of 0.125mmX0.260mm in the reading normal mode, one dot is displayed as one dot for data of the normal mode, and data in the fine mode or the super fine mode are displayed by applying periodical interleave to the subscanning data, then the image the same as the aspect ratio of the sender side is displayed and the reduction in the display area of the entire display device is not caused.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display facsimile apparatus for displaying a document or image read by a reading device directly on a display device.

[0002]

2. Description of the Related Art Generally, in a fax, characters and image information are transferred as compressed data via a telephone line, and the receiving side records on paper by a printer such as a thermal paper printing system. Exchange of transmission and reception data at this time will be described with reference to FIGS. 6 to 13. On the transmission side, the transmission original 5 is decomposed into dot data by using the CCD and the image sensor 6 and transferred. The decomposition is such that the CCD of the reading device and the condensing pixels of the image sensor 6 are arranged in a line as shown in FIG. Direction (hereinafter referred to as the main scanning direction) and the original 5 is decomposed into a direction (hereinafter referred to as the sub-scanning direction) orthogonal to the main scanning direction in which the light-collecting pixels of the CCD and the image sensor 6 are arranged, and the density thereof is obtained. Is 8 lines / mm in the main scanning direction, 3.85 lines / mm, 7.7 lines / mm, 15.4 lines / in the sub scanning direction.
mm, which is 1 due to these three densities in the sub-scanning direction.
The size of the dots will be different. In the following, due to the difference in the density in the sub-scanning direction, 3.85 lines / mm are normal mode, 7.7 lines / mm are fine mode, and 15.4 lines / mm
mm is called super fine mode. The size of one dot of the read data is 0.125 mm × 0.260 mm in the normal mode as shown in FIGS. 7 (a), (b) and (c).
0.125 mm x 0.130 mm in fine mode, 0.125 mm x 0.065 in super fine mode
It becomes a rectangle of mm. Usually, the degree of light reception within this size is converted into a voltage by the CCD and the image sensor 6 and transmitted as binary data of white or black. On the receiving side,
As shown in FIG. 8, a thermal head 7 which is means for printing on thermal paper or the like is provided at a position corresponding to the main scanning direction, and the thermal head 7 matches the direction in which the heating elements are arranged. In this case, the array density of the heating elements is 8 / mm, which matches the density in the main scanning direction on the reading side. Further, in the sub-scanning direction, printing is performed while conveying the paper 8 to be printed in that direction, and the feeding density is 3.85 lines / mm, 7.7 lines / mm, similar to the reading side. 15.4 / mm
have. That is, the size of one dot on the printing side is 0.125 mm × 0.260 mm in normal mode, 0.125 mm × 0.130 mm in fine mode, and 0.125 mm × 0.065 mm in super fine mode, which is exactly the same as that on the reading side. It will be recorded at the resolution.

However, in recent years, a method has been adopted in which, as an output device on the receiving side, printing is not performed on paper, but the received contents are displayed on a display display device and printing is performed on paper as necessary. As this display device, a liquid crystal display may be used for the purpose of small size, thinness, and low power consumption. At this time, one dot of the read data sent from the transmission side to one pixel of the liquid crystal display is used. The problem is how to respond. In a liquid crystal display, although one pixel has a difference in size, it is usually formed with an aspect ratio close to a square. Now, assuming that the size of one pixel of the liquid crystal display is 0.125 mm ×
0.125mm, fine mode 0.1
Since a rectangular dot of 25 × 0.130 mm corresponds to one pixel of the liquid crystal display 1, the data of 0.130 mm in the sub-scanning direction becomes 0.125 mm as shown in FIG.
It means that it has been compressed by 4%. Similarly, in the normal mode, as shown in FIG. 10A, data of 0.260 mm in the sub-scanning direction is compressed to 0.125 mm by 52%. Therefore, as shown in FIG. 10B, a character such as T is displayed as a vertically collapsed shape. On the contrary, in the super fine mode, as shown in FIG. 11A, the data of 0.065 mm in the sub-scanning direction is 0.125 mm, which is 92% extension.
As shown in (b), the letter T becomes an extended letter.

There are the following methods for making the aspect ratio on the display the same as the transmitted data. That is, as shown in FIG. 12, one dot of the transmission side data is 0.1.
In the case of the normal mode of 25 mm × 0.260 mm, one dot corresponds to two vertical lines of one pixel of the liquid crystal display and has a size of 0.125 mm × (0.125 mm × 2). If this is done, the aspect ratio will be almost the same, but in this case, since 2 dots are used vertically, only half of the vertical width corresponding to the sub-scanning direction of the liquid crystal screen can be displayed, and the received document, image You can see only about half of that.

Further, as shown in FIGS. 13 (a), 13 (b) and 13 (c), the size of one pixel of the liquid crystal display is 0.125 mm × 0.
If it is 065 mm, it is 1: 1 in super fine mode.
In the fine mode, the aspect ratio is made to be the same by making it correspond to 1: 2 and in the super fine mode to be 1: 4, but in this case, it is 1/2, 1 with respect to the vertical width corresponding to the sub-scanning direction of the liquid crystal screen. Only / 4 can be displayed.

[0006]

As described above, in the conventional display method, the density of the sent data in the sub-scanning direction 3.
For each of 85 lines / mm, 7.7 lines / mm, 15.4 lines / mm, the aspect ratio with the density of 8 lines / mm in the main scanning direction is not always constant, and the sub scanning direction shrinks, Or it had a problem of stretching.

The present invention solves the above-mentioned problems by displaying a liquid crystal display or the like at the same ratio without changing the aspect ratio of the data sent from the transmitting side without reducing the displayable data. It is an object of the present invention to provide a display facsimile device capable of displaying data on the device.

[0008]

According to the present invention, in order to achieve the above object, the aspect ratio of one pixel is set to main scanning: sub scanning = 0.1.
A display device configured at 25: 0/260 and the transmission data is displayed as it is in the normal mode, one in two in the fine mode and three in four in the super fine mode, and the data is thinned out in the sub-scanning direction. And means for displaying.

[0009]

According to the present invention, with the above-mentioned structure, the normal mode of 0.125 mm ×
One dot is displayed for 0.260 mm data, and one of the two data in the sub-scanning row is thinned out for 0.125 mm × 0.130 mm data in the fine mode.
Super fine mode 0.125mm × 0.065mm
3 out of the 4 sub-scanning row data is thinned out so that the same aspect ratio as the transmitting side can be displayed on the display means, and the displayable range does not decrease.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 1, 2, 3, 4, and 5. In FIG. 1, reference numeral 1 denotes a liquid crystal display, on which 1728 dots in the main scanning direction and 302 dots in the sub scanning direction are arranged. 1728 dots in the main scanning direction correspond to a density of 8 lines / mm on the transmission side in a 1: 1 ratio, and correspond to the number of data for 216 mm of the original, and can cover all 210 mm of the short side of the A4 format. The size of one pixel on the liquid crystal display 1 is 0.135 mm in the main scanning direction and 0.
278 mm, and the ratio is 0.135: 0.278≈
0.125: 0.260, and the sender data is 0.12
It corresponds to an aspect ratio of 5 mm x 0.260 mm. That is, when the data on the transmission side is in the normal mode, one dot of the transmitted data is made to correspond to one pixel of the liquid crystal display 1, and as shown in FIG. 3, one dot of the transmission data is 0.125 mm × 0.260 mm. On the display side, one dot appears as 0.135 mm × 0.278 mm, and the aspect ratio is almost the same as the transmission side. Next, if the sending side data is in fine mode, the sent data is 1 dot 0.125 mm ×
If 0.130 mm is made to correspond to one pixel of the display, the characters will be elongated, so that each data A, B, C, D, E, F of the sub-scan row is displayed by the display control unit 2 shown in FIG.
.. is stored in the display memory 3 every other line. As a result, the display data read from the display memory 3 becomes A, C, E ... As shown in FIG. 4, and the transmission data corresponding to one pixel (0.135 mm × 0.278 mm) of the display is apparently 0.125 mm × 0.260 mm (0.130 x
2) and almost the same aspect ratio can be obtained. Next, the sending side data is in the super fine mode (0.125
mm × 0.065 mm), each data A, B, and B of the sub-scanning row is controlled by the display controller 2 as in the fine mode.
C, D, E, F, G, H, I, J, K ... Are stored in the display memory 3 every three lines. As a result, the display data read from the display memory is A, E, I as shown in FIG.
...... Next display 1 pixel (0.135 mm × 0.2
The transmission data corresponding to (98 mm) is apparently 0.125.
mm × 0.260 mm (0.065 × 4), and also in this case, almost the same aspect ratio can be obtained.

As described above, according to the embodiment of the present invention, in the display device of the liquid crystal display, the aspect ratio of one pixel of display is set to main scanning direction: sub scanning direction = 0.125: 0.260. By periodically thinning out the data of the sub-scanning density from the transmitting side as needed, it is possible to display the same aspect ratio of the data on the transmitting side. Further, since the data in the sub-scanning row is not overlaid, the display portion of the entire display does not decrease.

[0012]

As is apparent from the above description, according to the present invention, the aspect ratio of one pixel of the liquid crystal display for displaying the received data of the fax is set to 0.125: 0.260. Among the three modes of sub-scanning density of, the fine mode 7.7 lines / mm and the super fine mode 15.4 lines / mm are partially thinned out periodically to reduce the transmission side data. It can be displayed without changing the aspect ratio, and can provide a display that is easy to read. Furthermore, it does not cause a problem that the data of the sub-scanning line that can be displayed on the entire display is reduced, and is extremely effective in displaying received data and displaying an input document for reading in the own device.

[Brief description of drawings]

FIG. 1 is a perspective view of a display facsimile apparatus according to an embodiment of the present invention.

FIG. 2 is a block diagram of a display unit of a display facsimile apparatus according to an embodiment of the present invention.

FIG. 3 is a dot image diagram of a display facsimile apparatus in a normal mode according to an embodiment of the present invention.

FIG. 4 is a dot image diagram in a fine mode of a display facsimile apparatus according to an embodiment of the present invention.

FIG. 5 is an image diagram of a display facsimile apparatus in a super fine mode according to an embodiment of the present invention.

FIG. 6 is a perspective view of a conventional display facsimile apparatus.

7A is an image diagram of read data in a normal mode of the present invention and a conventional display facsimile apparatus, and FIG. 7B is an image diagram of read data in a fine mode of the present invention and a conventional display facsimile apparatus in FIG. 7C. Image diagram of read data in super fine mode of the present invention and the conventional display facsimile apparatus

FIG. 8 is a perspective view of a recording / printing unit of a conventional display facsimile apparatus.

FIG. 9 is a dot image diagram of a conventional display facsimile machine in a normal mode.

10A is a dot image diagram of a conventional display facsimile apparatus in a fine mode, and FIG. 10B is an image diagram of a conventional display facsimile apparatus displayed in a fine mode.

11A is a dot image diagram of a conventional display facsimile apparatus in a super fine mode, and FIG. 11B is an image diagram of a conventional display facsimile apparatus in a super fine mode display.

FIG. 12 is a dot image diagram of another example of a conventional display facsimile apparatus in a normal mode.

FIG. 13A is a dot image diagram of another example of a conventional display facsimile apparatus in a normal mode, and FIG. 13B is a dot image diagram of another example of a conventional display facsimile apparatus in a fine mode. Figure of dot image in super fine mode of another example of display facsimile machine

[Explanation of symbols]

 1 Liquid crystal display 2 Display control unit 3 Display memory 4 Display device 5 Original paper 6 Image sensor 7 Thermal head 8 Printing paper

Claims (1)

[Claims] 1. A receiving means for receiving image data and a display means for displaying the image data received by the receiving means, wherein the image data received by the receiving means is periodically thinned to the display means. A display facsimile apparatus comprising means for displaying.