JPS6113866A - Recorder - Google Patents

Abstract

PURPOSE:To prevent color blurring even in case multi-color recording by providing a detecting means of an edge in a broadwise direction of recording paper and a means calculating the correction value of position deviation by a detection signal from the detecting means of the edge. CONSTITUTION:A caption 4 is a detector detecting that the tip of recording paper reaches a prescribed position, the detector is connected to a timer 9 via a signal line A and further connected to a left end reader 5 of the recording paper via a signal line B. The timer 9 is started by a signal detecting the tip of the recording paper, transmits a scan start signal to a dot data output start command device 7 after a prescribed time is elapsed and start recording. The left end reader 5 is connected to a position correcting calculator 6 calculating an error of the recording paper from a normal position via a signal line C. Further, the dot data output start command device 7 commands from which position of a laser beam the modulation by the dot pattern is to be executed to the dot converter 2 based on the information calculated by the position correction calculator 6.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a recording apparatus, and more particularly to a recording apparatus suitable for use in color recording.

[Prior Art] Conventional monochromatic color recording devices do not have recording position correction means, and the recording position may shift due to poor accuracy of the recording device itself, making it difficult to perform multicolor recording by replacing toner or cartridges. If you try to do this, color shift occurs and clear multicolor recording cannot be performed, which is a drawback.

[Purpose] The present invention has been made in order to eliminate the above-mentioned drawbacks of the conventional technology, and is provided with a recording position correction means to prevent the occurrence of recording position deviation, and to improve the performance when performing multicolor recording, etc. It is an object of the present invention to provide a recording device configured in such a manner that no color shift occurs.

[Example] Hereinafter, the present invention will be described in detail based on the example shown in the drawings.

Figure 1 and the following diagrams explain one embodiment of the present invention.
The figure shows a block diagram of the control circuit.

The symbol l in Figure 1 is a host computer that sends out character codes and image data, and converts the output character codes into phonito patterns corresponding to the codes, or converts image data in scan line units. It is connected to a dot conversion device 2 which divides the image into two.

This dot conversion device 2 modulates a laser beam with dot data, and a laser beam printer 3 performs recording.
It is connected to the.

On the other hand, what is indicated by the reference numeral 4 is a detection device that detects when the leading edge of the recording paper has reached a predetermined position. It is connected to the reading device 5.

The timer 9 is activated by a signal that detects the leading edge of the recording paper, and after a certain period of time has passed, sends a scan start signal to the dot data output start instruction device 7 to start recording.

The left edge reading device 5 is connected via a signal line C to a position correction calculation device 6 that calculates the error from the normal position of the recording paper.

Furthermore, the dot data output start instructing device 7 instructs the dot converting device 2 from which position of the laser beam the dot pattern should be modulated based on the information calculated by the position correction calculation device 6 via the signal line E. .

What is indicated by numeral 8 is a correction position storage register.

By the way, FIG. 2 shows the relationship between the recording paper, each detection device, the scanning direction of the laser beam, and the feeding direction of the recording paper, and the same parts as in FIG. 1 are given the same reference numerals.

In FIG. 2, the reference numeral 10 is recording paper, and the reference numeral 1
The arrow 1 indicates the scanning direction of the laser beam printer, and the arrow 12 indicates the recording paper feeding direction.

On the other hand, FIGS. 3 to 6 show the state read by the left edge reading device 5 of the recording paper at the time when the leading edge detection device 4 of the recording paper detects the leading edge of the recording paper.

The left end reading device 5 has CCDs arranged in a matrix, and when the recording paper is being fed normally, approximately half of the left end reading device 5 is covered with the recording paper 10 as shown in FIG. The unshielded part of the left end reading device 5 shown by and the code ? The ratio with the shaded portion shown in (2) is a constant value.

On the other hand, if the recording paper is shifted to the right in the direction of travel, the light-shielded portions 2 and 1 are shifted to the right, as shown in Figure 4, and the ratio with the unshielded portions becomes smaller. ing.

Also, if the recording paper is shifted to the left in the direction of travel, the fifth
As shown in the figure, the light-shielded portion 21 is closer to the left side, and the ratio thereof is extremely large.

In addition, when the recording paper is blocking light, the boundary between the light-blocking part and the non-light-blocking part is zigzag, as shown in Figure 6, and it is not a straight line, but the recording paper is blocking the light. is detected.

On the other hand, FIG. 7 is an explanatory diagram for adjusting the timing of starting modulation of a laser beam using position correction data calculated as described later, and FIG. In figure (B), the recording paper is the third
The modulation start position (b) is shown when the normal position shown in the figure is being sent, the same figure (C) is the modulation start position (c) when it is shifted to the right, and the same figure (D) is (d) shows the modulation start position when the recording paper moves to the left.

Next, the recording position correction operation of the recording apparatus configured as follows will be explained.

When the recording paper is fed from a predetermined paper feeding position, the leading edge is first detected by the leading edge detection device 4, the timer 9 is activated via the signal line A, and then the left edge reading device 5 is connected to the signal line B.
Sends a detection signal via.

By the way, if the recording paper is fed to the correct position, the reading state will be as shown in Figure 3, and if it is shifted to the right or left, the reading state will be as shown in Figures 4 or 5. , when the light is shielded, the reading state is as shown in FIG.

The image read by the left edge reading device 5 is sent to a position correction calculation device 6 via a signal line C, and the direction and amount of deviation of the recording paper are calculated.

The position correction calculation device 6 converts the deviation of the recording paper into a laser beam modulation start adjustment time t, and sends it to the dot data output start instruction device 7 via the signal line F.

If the recording paper is shielded from light, a recording prohibition signal is sent to the dot conversion device 2 to prohibit recording of that page.

The laser beam modulation start adjustment time t is stored in the correction value storage register 8, and t is added to the interrupt start time To from the timer 9 to instruct the dot conversion device 2 to start modulating the laser beam via the signal line E. do.

The dot conversion device 2 converts character data, graphic data, etc. sent from the host computer 1 into dot data for each scan, modulates the laser beam generated by the laser beam printer 3 in response to a laser beam modulation start signal, and records the desired data. Do the following.

That is, as shown in FIG. 3, when the recording paper 5 is being fed to the normal position, the correction value is O, and as shown in FIG. After an hour, start modulating the laser beam.

Also, if the recording paper is shifted to the right (as shown in Figure 4)
-, the correction value is +t1, and modulation starts after time T+t1.

In other words, the modulation start time is shifted by the amount shifted to the right.

Further, as shown in FIG. 5, when the recording paper is shifted to the left, the correction value is -t2, and modulation starts after Tt2 time.

In other words, the modulation start time is brought forward.

If the recording paper is shielded from light, recording is prohibited as described above.

In this way, it is possible to always record from a predetermined position on the recording paper, and when performing multicolor recording by replacing toner of different colors, it is possible to obtain images without color shift. can.

In addition, clear recording without positional deviation can be performed not only in multicolor recording but also in form overlay where form data and character data are superimposed.

Furthermore, it can be applied not only to laser beam printers but also to wire dot printers and thermal printers.

[Effects] As is clear from the above description, according to the present invention, the recording position can always be set at a predetermined position based on the direction and amount of displacement of the recording paper, so that multi-color printing is possible. It is possible to obtain a recording device that does not cause color shift or recording shift even when performing recording, overlapping recording, or the like.

[Brief explanation of drawings]

The figures explain one embodiment of the present invention. Figure 1 is a block diagram of a control circuit, and Figure 2 shows the relationship between the recording paper, various detection means, the scanning direction of the laser beam, and the recording paper feeding direction. The explanatory diagrams, Figures 3 to 6, show when the recording paper is being fed normally, when it is being fed to the right in the direction of travel,
Explanatory diagrams showing the case of feeding to the left in the direction of travel and the case of oblique feeding. Figures 7 (A) to (D) show the laser beam scanning range and the start of laser beam modulation according to the state of deviation of the recording paper. FIG. 3 is a diagram illustrating the relationship with position. 1... Host computer 2... Dot conversion device 3... Laser beam printer 4... Recording paper leading edge detection device 5... Recording paper left edge reading device 6... Position correction calculation device 7... Dot data output starting device 8... Correction value storage register 9... Timer 10... Recording paper 11...
Laser beam scanning direction 12...Recording paper feeding direction Fig. 3 Fig. 4 Fig. 5 Fig. 6 etc.

Claims (1)

[Claims] In a recording apparatus that performs recording on incoming recording paper through a recording means that is operated in accordance with a recording signal, the recording apparatus includes a means for detecting an edge in the width direction of the recording paper, and a detection signal from the edge detecting means. means for calculating a correction value for positional deviation by means for calculating a positional deviation correction value, means for instructing to start recording based on a signal from this correction value calculating means, and means operated based on a signal from this recording start instruction means to convert an image into a dot image. 1. A recording apparatus comprising: dot conversion means for transmitting a recording signal to a recording means.