JPS63135069A - Left/right inverting printing device - Google Patents

Abstract

PURPOSE:To attain the left/right inverting print by applying print while maintaining the order of horizontal line fetched at print in a decreasing direction from the lowermost horizontal line opposite to the conventional state so as to have only to change the print control. CONSTITUTION:In applying left/right inverting print, at first a control section 6 sets a timing fetching the signal of the lowermost horizontal line signal of an inputted RGB signal to the timing circuit 5 to print one horizontal line at the lowermost part of the picture signal. When the print of one horizontal line is finished, the print paper is fed by one horizontal line and the control section 6 sets the timing to fetch one preceding horizontal line to the preset horizontal line to the timing circuit 5 newly to print one horizontal line. Thus, the horizontal line at the lowermost part (taken as the n-th) of the video signal is the 1st horizontal line of the print output, and the (n-1)th line of the video signal is the 2nd horizontal line of the print output,... then the print output having the same left right position as the video signal but opposite to the upper/ lower position is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a line printing device for printing video signals.

<Summary of the Invention> The present invention provides a line printing device that captures and prints a video signal one horizontal line at a time, in which the order of the horizontal lines to be captured is reversed from the usual order, starting from the bottom horizontal line and starting from the top horizontal line. By printing so that it ends with , a horizontally reversed print can be obtained.

<Prior Art> Conventional printing apparatuses for printing this type of video signal simply print the video signal as it is on paper.

<Problems to be Solved by the Invention> For this reason, when performing left-right reversal printing, the circuit must be changed, and a new circuit is required.

Means for Solving the Problems> In the present invention, the order of horizontal lines taken in during printing is reversed from the usual order, and printing is performed in a direction that decreases from the lowest horizontal line.

Function> Therefore, horizontally reversed printing can be performed simply by changing the print control.

<Example> Hereinafter, one embodiment of the present invention will be described based on the drawings.

FIG. ta1 is a block diagram showing an embodiment of the printing apparatus of the present invention, and an RGB signal obtained by digitally converting a video signal, a horizontal synchronization signal, and a vertical synchronization signal are input to this printing apparatus.

In the second case of normal printing, the control section 6 first receives the input R.
The timing for capturing the first horizontal line of the GB signal is set in the timing circuit 5. The timing circuit 5 sets the timing using the input horizontal synchronization signal and vertical synchronization signal, takes in data of one horizontal line of the designated RGB signal, and inputs it to the data acquisition control circuit 1. The captured horizontal line data is temporarily stored in the storage unit 2 from the data capture control circuit 1, then subjected to gradation processing in the gradation processing circuit 3, and sent to the line thermal head 4 as print data.
is output to. A head control signal is input to the line thermal head 4 via a thermal head control circuit 7, and printing is performed based on this head control signal. When the printing of one horizontal line is completed, the printing paper (not shown in the figure) is fed by one horizontal line, and the control unit 6 newly sets the timing to take in the next horizontal line using the timing circuit 5, and prints the next horizontal line. Prints one horizontal line.

The correspondence between the video signal and print output for normal printing performed as described above is as shown in Figure 2.The first horizontal line of the video signal is the first horizontal line of the print output, and the second horizontal line of the video signal is
The second horizontal line is the second horizontal line of the printout,
. . . Therefore, a printout according to the input video signal can be obtained.

When performing horizontally inverted printing, the control unit 6 first sets the timing circuit 5 to take in the signal of one horizontal line at the bottom of the input RGB signal, and prints the one horizontal line at the bottom of the image signal. do. When the printing of one horizontal line is completed, the printing paper (not shown in the figure) is fed by one horizontal line, and the control unit 6 sets the timing to take in the one horizontal line immediately before the previously set one horizontal line using the timing circuit 5. , and print one horizontal line.

When printing is performed with the above settings, the correspondence between the video signal and the print output is as shown in Figure 3, at the bottom of the video signal (n
The horizontal line of the printout (the 1st horizontal line) is the 1st horizontal line of the printout, the n-1st line of the video signal is the 2nd horizontal line of the printout, etc., so the left and right sides are the video signal. You will get the same printout, but with the top and bottom upside down. If this print output is turned upside down and viewed, the print output is the same as the video signal up and down, but the left and right sides are reversed, resulting in horizontally reversed printing.

<Effects of the Invention> With the above configuration, horizontally reversed printing can be easily realized by simply changing the printing control.

[Brief explanation of the drawing]

Fig. 1 is a block diagram showing an embodiment of the present invention, Fig. 2 is a correspondence diagram between video signals and print output in the case of normal printing, and Fig. 3 is a correspondence diagram between video signals and print output in the case of horizontally reversed printing. It is. DESCRIPTION OF SYMBOLS 1...Data acquisition control circuit, 2...Storage part, 3
... Gradation processing circuit, 4 ... Line thermal head, 5 ... Timing circuit, 6 ... Control section, 7 ... Thermal head control circuit. Agent: Patent Attorney Itaru Sugiyama Mata (and 1 other person) Figure 1 Minato Hozo ε Bakumu〃 Funeral Figure 2 Figure 113

Claims (1)

[Claims] 1. In a line printing device that captures and prints video signals one horizontal line at a time, the order of the horizontal lines to be captured is reversed from the normal order, starting with the bottom horizontal line and ending with the top horizontal line. A left-right reversal printing device that prints.