JPH03100694A - Device and control system for picture display in facsimile equipment - Google Patents

Abstract

PURPOSE:To prevent a lengthy image coinciding with a width scanning direction dissipated from a picture display by comprising a system in such a way that a display element is driven and held by thinning every second facsimile picture signal element by supplying aberration of 1/2 cycle with an adjacent main scanning line, and connecting it to the picture display. CONSTITUTION:Assuming that the display element 12 is arranged successively from a left end at a display element string 11-A, and the display element 12 arranged successively at a display element string 11-B is placed in parallel with the display element string 11-A, alternate arrangement is formed in which the intermediate position of string on one side exists at the center position of the string on the other side. The display element 12 in the display element string 11 displays visually a picture element signal on one main scanning line. Therefore, the display element strings 11-A, 11-B are arranged so that they are set alternately in the width scanning direction and also, almost the same interval as that of the display element 12 in the display element string 11 can be obtained, and the picture display 10 is formed. Thereby, a lengthy straight line in the width scanning direction is recorded on recording paper, however, it is always displayed on the picture display.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention displays facsimile screen information having pixel element signals encoded in the main scanning direction at intervals of approximately 1/2 in the sub-scanning direction. The present invention relates to a screen display of a facsimile machine, and a screen display control method for the facsimile machine that drives and controls display elements constituting the screen display.

[Conventional technology]

Conventionally, the screen display of this type of facsimile machine has formed a display screen by arranging, for example, liquid crystal display elements at equal intervals vertically and horizontally.

FIG. 6 is a plan view of a part of a display screen showing a conventional example. The display screen illustrated in FIG. 6 is constructed by arranging display elements 12 horizontally in a line to form one display element row 11, and further arranging this display element row 11 vertically. Screen information from a facsimile machine is obtained by setting main scanning lines perpendicular to the feeding direction of the document and scanning the screen continuously, and when scanning from the left edge to the right edge is completed, an EOL (End or Line) signal (hereafter a scanning line switching signal) is generated. ), return to the left end, and scan the next main scanning line. The spacing between main scanning lines is 3.75 pet/, which means 3.75 lines per 1 mm.
mm, and the document feeding speed (sub-scanning speed) that maintains this interval is limited by the screen reading speed (main-scanning speed) in the main scanning line.

The standard facsimile machine specifies that the main scanning line is encoded using approximately twice as many points based on the main scanning line spacing, that is, 8p.
Pixel elements are scanned and encoded at intervals of el/mm.

However, since the display elements 12 of the screen display device 20 are arranged at approximately equal intervals vertically and horizontally, the encoded pixel signal of the facsimile screen information is extracted every other pixel element.

Therefore, the conventional screen control method of this type of facsimile machine extracts either odd numbered or even numbered scanning pixel signals of the main scanning line, erases the other, and connects it to the screen display.

FIG. 7 is a time chart showing an example of a conventional extracted signal. According to FIG. 7h, the pixel signal in each main scanning line is
All even numbers are extracted and odd numbers are deleted.

FIG. 8 is a scanning explanatory diagram and a display screen diagram showing an example of scanning a screen having a straight line C orthogonal to two vertically parallel straight lines AB with main scanning lines 81 to 84. Main scanning line 8
1 to 84 obtain pixel signals at signal positions 1 to 11, respectively. However, due to the arrangement of display elements on the display screen, odd-numbered pixel signals are erased.

When the pixel reading moves horizontally, the document moves vertically, so the main scanning line runs diagonally across the screen.

Therefore, when the two straight lines A-B are located at each of the signal positions 5 and 8, and the straight line C is obliquely crossed by the main scanning line 83, in the display element rows 1 to 4 corresponding to the main scanning lines 81 to 84,
Only signal positions 8 of display element rows 1 to 4 and signal positions 4, 6, and 8 of display element row 3 form an image. In other words, straight line A disappears even though it is long.

[Problem to be solved by the invention]

As mentioned above, the screen display device and screen display control method of conventional facsimile machines read and encode pixel signals at intervals of approximately 1/2 of the interval in the sub-scanning direction (paper feeding direction) of the main scanning line. Since the pixel signals are extracted every other time, pixel signals are output at evenly spaced positions, and the pixel signals are connected to a screen display having display elements arranged at evenly spaced intervals for display. There is a problem in that a long straight line in the sub-scanning direction that is narrower than the extracted pixel interval is recorded on the recording paper, but may not be displayed on the screen display.

An object of the present invention is to provide a screen display for a facsimile machine that solves the problem of straight lines disappearing by setting the main scanning line extraction/erasure pixel positions alternately for one line and for odd and even numbers. The object of the present invention is to provide a screen display control method.

[Means to solve the problem]

The screen display device of the facsimile device according to the present invention displays facsimile screen information having pixel signals encoded in the main scanning direction at intervals of approximately 1/2 in the sub-scanning direction, and also displays a line in the main scanning direction. In a screen display of a facsimile machine, the screen display device of a facsimile machine has a display screen formed by aligning display element rows formed by a plurality of display elements arranged in parallel rows in the sub-scanning direction at substantially the same intervals as the arrangement of the display elements. The screen has display element rows arranged in parallel in the sub-scanning direction at relative positions where the display elements adjacent to each other in the sub-scanning direction match a center line and an intermediate line.

In addition, the screen display control method of the facsimile device that drives the screen display device is such that facsimile screen information having pixel signals encoded in the main scanning direction at intervals of approximately 1/2 in the sub-scanning direction is scanned in the main scanning direction. Screen information that restores received facsimile image information to screen information and stores it in a screen display control method for a facsimile machine that thins out every other direction signal and controls the drive of the display element displayed on the display screen. The pixel signal on the main scanning line read from the screen information storage section is thinned out and erased every other pixel signal, and the pixel signal is thinned out every other pixel signal on the main scanning line at the end of scanning of the main scanning line. The display device includes a signal thinning section that moves the thinning/erasing position by a phase of 1/2 period and outputs the signal, and a display element driving section that sequentially connects the output of the signal thinning section to drive and hold the display element.

〔Example〕

Next, the screen display of the facsimile machine of the present invention will be explained with reference to FIG.

FIG. 1 is a plan view showing one embodiment of the present invention.

In FIG. 1, a screen display 10 includes a plurality of display element rows 1.
1. That is, the display element array 11 is configured by alternately arranging two types of display element arrays 11-A and 11-B. The display element row 11 is formed by arranging a plurality of display elements 12 in a straight line. The display element 12 visualizes one pixel element signal.

In the display element row 11-A, display elements 12 are consecutively arranged from the left end. The display elements 12 in the display element row 11-B are arranged in an alternating manner so that when the display elements 12 are arranged in parallel with the display element row 11-A, the intermediate position of one is at the center of the other.

The display elements 12 of the display element row 11 visually display pixel signals on one main scanning line. Therefore, display element row 11-A
・11-B is arranged alternately in the sub-scanning direction, and the display element rows 11
The screen display device 10 is formed by disposing the display elements 12 at substantially the same spacing as that of the display elements 12 .

Next, with reference to FIGS. 1 to 4, a screen display control system for a facsimile apparatus according to the present invention will be described.

In FIG. 1, since the interval between display element rows 11 is 3.75 pel/mm between main scanning lines in sub-scanning, the display element interval in display element row 11 is equal to the coded pixel interval of 8 pel/mm. It is doubled to 4 pel/mm. Therefore, as in the past, every other pixel signal of the facsimile screen information is thinned out.

FIG. 2 is a time chart showing an example of pixel element signals connected to the display element arrays 11-A and 11-B in FIG. 1. According to FIG. 2, the odd-numbered pixel signals on the main scanning line are extracted and connected to the display element column 11-A, and the even-numbered pixel signals are extracted and connected to the display element column 11-B.

FIG. 3 is a scanning explanatory diagram and a display screen diagram showing an example of scanning a screen having a straight line C orthogonal to two vertically parallel straight lines A-H using main scanning lines 31 to 34. In FIG. 3h, the pixel signals of the main scanning line 31 are connected and displayed on the display element row 1, and similarly the pixel signals of the main scanning lines 32-34 are connected and displayed on the display element rows 2-4. The main scanning lines 31 to 34 have pixel signals of signal 8 positions 1 to 11, but the pixel signals of the main scanning lines 31 and 33 are even-numbered, and the pixel signals of the main scanning lines 32 and
The 34 odd-numbered pixel signals are connected and displayed on the screen, and the other pixel signals are thinned out and erased.

In Fig. 3, straight lines A-B in the sub-scanning direction are located at signal positions 4 and 7, respectively, so straight line A is at display element rows 1 and 3, and straight line B is at display element rows 2 and 4, respectively. Is displayed. The straight line C crossed by the main scanning line 33 is displayed at signal positions 4, 6, and 8 on the display element row 3, as in the conventional case. 4 is a block diagram showing an embodiment of the present invention. Fourth
In the figure, the screen display means for facsimile screen information is
Screen display device 201 Screen information storage section 21, Image display control section 2
21 column selection section 23. Signal thinning section 24. and a display element driving section 25.

The configuration blocks are the same as those of the conventional one, but include the above-mentioned screen display 20, image display control section 22, and signal thinning section 24.
The functions are different.

The screen display device 20 is similar to that described in FIG. 1, and is made up of M display element rows 11 having N display elements 12 arranged alternately with the mutual positions of the display elements 12 being shifted by 1/2. be. Drive inputs from the display element driving section 25 to the display element rows 11 are connected to numbers 1 to N of the display elements 12 sequentially from the left end of each display element row 11 as shown in FIG. That is, signal positions 1 and 2 shown in FIG. 3 are connected to input terminal 1, and signal positions 3 and 4 are connected to input terminal 2, respectively.

The screen information storage unit 21 restores facsimile image information that has been subjected to redundancy suppression encoding processing, for example, to pixel element signals for each pixel element constituting a screen, and stores the information for each page. The image display control unit 22 receives scan information from the operating panel and controls screen display.

For example, when the image display control section 22 receives a facsimile screen display request as operation information, it instructs the screen information storage section 21 to send the screen information, and also instructs the column selection section 23 to select the display element column 11. .

The image display control section 22 exchanges control signals with the screen information storage section 21, and when receiving a scanning line switching signal, for example, it sends a message to the column selection section 23 saying, ``Move the selection of the display element column 11 to the next order.''

'', and also sends a switching instruction signal to the signal thinning section 24. The column selection section 23 sequentially moves and selects the display element columns 11 of the screen display 20 in response to a column instruction signal from the image display control section 22 .

The signal thinning unit 24 thins out every other pixel signal received from the screen information storage unit 21 and sends it to the display element driving unit 2.
5, and upon receiving a switching instruction signal from the image display control unit 22, the thinning signal is switched between odd and even numbers as shown in FIG.

In the case of an odd/even designation difference, the image display control section 22 transmits a phase control signal to the signal thinning section 24 according to the operation information, and the signal thinning section 24 can perform switching.

The adjustment can also be made by instructing the column selection section 23 from the image display control section 22 and moving the display element column 11 of the screen display 20 by one column. The phase control means may be used as a signal that is continuously changed according to operation information. The signal thinning unit 24 performs odd/even switching of the pixel element signals by using the screen information storage unit 21.
After receiving a series of pixel signals from , the scanning line switching signal may be directly received and executed.

The display element driving section 25 sequentially connects the received thinned out pixel signal to the display elements 12 of the display element row 11 specified by the column selection section 23, drives the display elements 12, and at the same time drives the display elements 12 at the next driving time. The signal will remain visible on the screen until

Since the screen display device 20 does not have the full screen capacity of normal paper, the image display control section 22 sends the position control means to the signal thinning section 24 according to the operation information, and the display element 12 is moved from position 1 to
By specifying which signal position on the main scanning line should be applied to N and which main scanning line to output from,
You can set the display screen as usual.

Next, the main operating procedure in FIG. 4 will be explained with reference to FIG. 5 and FIG. 4. FIG. 5 is a flowchart showing one embodiment of the present invention.

First, a screen display request is sent to the screen display control unit 2 using operation information.
2 receives (101) 1. At this time, the image display control section 22 activates the screen information storage section 21. The screen information storage unit 21 is
If no screen information is accumulated, facsimile image information is requested and received (102). If the received image information has been subjected to redundancy reduction encoding processing, for example, the screen information storage unit 2
1 restores the received image information and stores one page worth of memory (10
3) Do.

The image display control unit 22, which has received the notification of the completion of accumulation from the screen information storage unit 21, instructs the column selection unit 23 to select the first display element column (104), and also instructs the signal thinning unit 24 to select the screen information. The screen information of the first row of scanning lines is extracted from the storage unit 21 as a pixel signal (105). Signal thinning section 2
4 thins out (106) predetermined even-numbered pixel signals and outputs them to the display element driving section 25. The display element driving section 25 sequentially transmits the received pixel element signals to the first to Nth display elements 12 of the first display element row 11, and
2 is held (107) by the transmitted signal.

When the scanning line switching signal following the pixel signal of one main scanning line is extracted 108), the image display control unit 22 checks the presence or absence of remaining screen information (109), and if there is remaining screen information,
Sends a switching instruction signal to the signal thinning section 24 to cause the signal thinning section 24 to switch the thinning phase (l l O), and also instructs the column selection section 23 to select the next display element column 11 (111) . Switching of the thinning phase is performed by switching between odd number and even number of the thinning signal position of the pixel signal.

Next, the signal thinning section 24 takes out the screen information of the next row from the screen information storage section 21, and continues with the pixel signal thinning procedure of step 106.

On the other hand, if there is no remaining screen information in step 109, the operation procedure is stopped, the screen display stops (12,0)L, and the image display control unit 22 receives the next operation information (121)t.

When I received the information. Once the operation is processed.

〔Effect of the invention〕

As explained above, according to the screen display device and screen display control method of the facsimile apparatus of the present invention, the display elements of the display screen arranged in the sub-scanning direction are alternately moved in the main-scanning direction to align the center line of the adjacent display elements. A facsimile pixel signal element is connected to a thinning-erasing screen display device with a 1/2 cycle phase shift between adjacent main scanning lines, and every other one is connected to a screen display device whose midpoints are made to coincide with each other. Since the display device is configured to drive and hold the display element, it is possible to prevent a long and narrow linear image that coincides with the sub-scanning direction from disappearing from the screen display.

[Brief explanation of drawings]

FIG. 1 is a plan view showing an embodiment of the screen display device of the present invention;
FIG. 2 is a time chart showing an example of the drive signal for the display element in FIG. 1, FIG. 3 is an explanatory diagram showing an example of the signal position and screen display by screen scanning, and FIG. A block diagram showing one embodiment, FIG. 5 is a flowchart showing an example of the main operation procedure of FIG. 4, FIG. 6 is a plan view showing an example of a conventional screen display, and FIG. 7 is a display of FIG. 6. FIG. 8 is a time chart showing an example of an element drive signal, and an explanatory diagram showing an example of a signal position and screen display by screen scanning. 10.20...Screen display, 11...
Display element row, 12...Display element, 21...
... Screen information storage section, 22... Image display control section,
23... Column selection unit, 24... Signal thinning unit, 25... Display element drive unit, 31-34.
...Main scanning line.

Claims (2)

[Claims] (1) Display facsimile screen information with pixel signals encoded in the main scanning direction at intervals of approximately 1/2 in the sub-scanning direction, and display multiple displays forming a linear row in the main scanning direction. In a screen display of a facsimile machine having a display screen formed by display element rows formed by display elements arranged in parallel in the sub-scanning direction at substantially the same intervals as the arrangement of the display elements, the display device is adjacent to the display screen in the sub-scanning direction. A screen display device for a facsimile machine, characterized in that the display element rows are arranged in parallel in the sub-scanning direction at relative positions such that the center line and the intermediate line coincide with each other. (2) Facsimile screen information with pixel signals encoded in the main scanning direction at approximately 1/2 intervals in the sub-scanning direction is connected and displayed by thinning out every other signal in the main scanning direction. In a screen display control method for a facsimile machine that drives and controls display elements displayed on the screen, there is a screen information storage unit that restores received facsimile image information to screen information and stores it, and a screen information storage unit that restores received facsimile image information to screen information and stores it; pixel signal is thinned out and erased every other pixel signal, and the thinned out position of the pixel signal is moved by a phase of 1/2 period every time the scanning of the main scanning line is completed, with every other signal being one period, and outputted. 1. A screen display control method for a facsimile apparatus, comprising: a signal thinning section that performs the following operations; and a display element driving section that sequentially connects the output of the signal thinning section to drive and hold the display element.