JPS6065664A - Optical printer - Google Patents

Abstract

PURPOSE:To attain synchronizing easily and accurately by inserting a prescribed fill bit in response to a difference between the output timing of a picture data and a print operation timing. CONSTITUTION:Write of one line is processed by inserting a prescribed fill bit M in response to a difference between the output timing of the picture data D and the print operation timing. Even after an address counter 301 counts 1-N, since a count data inserted with a prescribed fill bit exists for (N+M)'s share, the count is not finished and a synchronizing signal SYNC is generated when the data is counted up to (N+M). Then the original scanning side receives the synchronizing signal SYNC and transmits the picture data of the 2nd line.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to an optical printer device using a light emitting element array as a light source.

[Prior art]

Conventionally, this type of device has been required to be compatible with all kinds of data output devices in order to function as a printer.

For example, when image data for one page is temporarily stored in a storage device, and image data for one line is read from the storage device at an arbitrary timing to perform a printing operation, write processing for one line is performed. In synchronization with the end, the image data of the next line can be immediately read out from the storage device and the printing operation of that line can be performed.

However, for example, when printing image data that is sequentially read line by line using a line sensor such as COD, it is difficult to immediately obtain image data for the next line after recording one line. Therefore, it has been difficult to accurately match the timing of outputting the read image data to the printer and the timing of the print operation. In addition, even when the amount of image data for one line of a document read by COD, or the number of pixels, is slightly smaller than the number of pixels that can be recorded in one line by an LED array, the timing of outputting the image data to the printer can also be adjusted. It is difficult to match the timing of the printing operation, and there is a problem in that a regular image cannot be obtained.

[Purpose of the invention]

This invention has been made by focusing on the above-mentioned problem, and involves inserting a predetermined fill plater according to the difference between the output timing of image data and the print operation timing, and performing 1: fin writing processing to write the fin. By generating a synchronization signal at the end of processing, it is possible to easily and accurately synchronize the output timing of image data output from any output data device with the print operation timing, resulting in proper image quality. The purpose is to obtain an optical printer device that can obtain the following.

[Explanation of Examples]

Hereinafter, one embodiment of the present invention will be explained as h() based on FIGS. 1 to 6.

FIG. 1 is a side view showing a schematic configuration of an optical printer device. In the figure, it is a photoconductor drum whose surface is made of a photoconductor, and it rotates in the direction of the arrow in the figure.
The surface weight is selected by 01. This photosensitive drum +00 is irradiated with light from the printer head 102 to form a latent image. After this, this latent image is transferred to the developing device 1.
03, toner is attached and visualized. on the other hand,
After the transfer paper stored in the cassette 104 is fed by a paper feed roller 105, the leading edge of the visible image formed on the photosensitive drum 100 by the registration roller 106 matches the leading edge of the transfer paper. It will be delivered at the appropriate timing. The toner adhering to the photosensitive drum 100 is transferred to a transfer paper and then fixed by a fixing device 108. The transfer paper on which the toner has been fixed is discharged to l.ray+09 as a print output. Further, after the transfer is completed, the surface charge of the photosensitive drum 100 is removed by the erase length 110, and the remaining toner is removed and cleaned by the cleaner 111, and the photosensitive drum 100 returns to its original state.

FIG. 2 is an enlarged plan view showing the basic configuration of an LED array 200 forming a large number of TJ E D' Ll -LN. In the figure, 201 is a substrate wafer, and GaAs (gallium arsenide) is generally used. 202
is an electrode, 203 is the substrate wafer 201 and S + 02
(Silicon peroxide)
91 is a light emitting unit with one light emitting unit on the substrate wafer 201.
They are arranged at a high density of about 6 elements. Therefore, this L
[The secret behind DDLI-LN is directly connected to resolution. In addition.

FIG. 3 shows the light intensity at the light emitting part 203 and the non-light emitting part of the LED play 200. This LED array 200 is provided in the printer head 102 shown in FIG. 1 as a light source for irradiating the photosensitive drum 100, and is positioned near the photosensitive drum +00, or as shown in FIG. The unirod lens array 204 is interposed between the photosensitive drum 100 and the photosensitive drum 1.
The image is focused on 00. Therefore, the photosensitive drum 100 is irradiated with light from the LED array 200 to form an @ image, and a printout is sent out through the above-described series of copying operations.

FIG. 5 is a block diagram of the optical printer device. In the figure, 300 LEDs L+ to LN formed in the T and ED array 200 are connected to a data selector, and image data D obtained by scanning a document is input to the data selector 300. Also, E is the above L
It is a driving power source for EDL+ to LN. 301 is the address counter.

When the clock pulse CLK is input, it starts counting,
Generates an address signal. This address signal is input to the data selector 300 via address bus AS. Then, in synchronization with this addressing, the data selector 300 sequentially distributes the image data D1 to DN to the LEDL+ to LN as shown in FIG. Even after counting from 1 to N, the address counter 302 does not finish counting because there are (N+M) pieces of count data with predetermined fill bits inserted.
(N+M)-1: Synchronous signal 5YN when counted
Generate C. And on the document scanning side, this synchronization signal 5YN
C is received and the second line of image data is sent out. Therefore, since the output timing of image data read by a 2-in sensor (not shown) such as 00.D matches the print operation timing, a proper image can be obtained. Note that the fill pits added to the count data may be appropriately set to a predetermined value depending on the difference between the output timing of the image data and the print operation timing.

〔Effect of the invention〕

As described above, the optical printer device of the present invention is an optical printer device that forms an image on a photoreceptor by lighting a light emitting element array according to image data obtained by scanning a document. By inserting a predetermined fill filter according to the difference between the output timing of image data and the print operation timing, performing reverse processing for one line, and generating a synchronization signal when the writing process is completed. , the data output timing from any data output value q for outputting image data can be easily and accurately synchronized with the print operation timing, and an appropriate image can be obtained. Therefore, for example, even if the amount of image data (number of pixels) for one line of a document read by COD etc. is smaller than the number of pixels that can be recorded for one line by an LED array, the timing of outputting the image data to the printer and printing Synchronization with the operation timing can be easily and accurately achieved, and appropriate images can be obtained.

[Brief explanation of drawings]

FIG. 1 is a side view showing a schematic configuration of an optical printer device according to an embodiment of the present invention, FIG. 2 is an enlarged plan view showing the basic configuration of an LED array, and FIG. A diagram showing the light intensity of a light emitting part and a non-light emitting part, FIG. 4 is an enlarged explanatory side view showing a rod lens array interposed between an LED array and a photoreceptor, and FIG. 5 is a diagram showing the same as shown in FIG. 1. The block diagram, FIG. 6, is a time chart of what is shown in FIG. 100... Photosensitive drum, 200... Light emitting element array, 300... Data selector, 301... Address counter, D... Image data + CLK... Clock pulse, 5YNC... Synchronization signal Figure 7 Figure 2

Claims (1)

[Claims] In an optical printer device that forms an image on a photoreceptor by lighting a light emitting element array in accordance with image data obtained by scanning a document, an optical printer is configured to form an image on a photoreceptor according to image data obtained by scanning a document. 1. An optical printer apparatus characterized in that a predetermined fill bit is inserted to perform a write process for one line, and a synchronization signal is generated when the write process is completed.