JPS59131476A - Printer - Google Patents

Abstract

PURPOSE:To make processing by word processor, etc., in real time by providing a controller to judge processing speeds in data processor and also to alter not only the timing of optical signal generation but also the processing speeds of electronic photography. CONSTITUTION:A printer mechanism is made up of an optical signal generator 1 with a liquid crystal shutter array and machine 2 to realize electronic photographic processing. An interface 4 to be connected with an outside host computer is connected to a data processor 3 for various kinds of soft processing, and the resultant data are inputted the optical signal generator 1. A controller 5 is provided to judge processing speeds in the data processor 3 and also to alter the timing of optical signal generation as well as the processing speeds of electronic photography in the machine 2. Printing can thus be made with high speeds when data processing is less but with low speeds when the data processing is much. Processing and printing can be made in real time without the use of full- page buffer, etc.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a high-speed optical printer that employs a liquid crystal shutter for generating optical signals, and more particularly to a printer that incorporates various processing functions.

Conventional optical printers are attracting attention not only in the field of large line printers but also as printers for word processors and image processors due to their high speed and high quality printing ability, including the use of plain paper.

However, especially in the case of a word processor, if the data processing section is to process right page edge alignment, proportional printing, etc. without placing a burden on the host computer, in the worst case, a full page buffer is required. This is because the processing speed of the data processing section does not follow the printing speed, and if the speed is 5001 pm or more, software processing is impossible.

A full-height H7A is equivalent to an in-bit system on a bit basis, resulting in a very high cost.

The present invention eliminates such drawbacks and minimizes silver line roughness γ.
The purpose is to prevent increases in costs (by performing the above processing in real time).

The present invention will be explained below.

FIG. 1 shows the configuration of the present invention. An optical signal generating section 1 having a liquid crystal micro-shutter array and an engine 2 that realizes an electrophotographic process form a printer mechanism. An interface section 4 for connection and various software processing,
A data processing section 3 is connected, and the resulting data is input to the optical signal generation section.

However, indispensable as a word processor printer,
If the data processing section 6 were to perform the processing of right page edge alignment and proportional printing in real time, the data transfer speed required by the printer mechanism would be too fast to follow. Therefore, in the present invention, a control section 5 is provided, and the judgment of the processing speed in the data processing section 6 is given to the control section 5. Therefore, it is possible to not only change the timing of optical signal generation, but also change the electrophotographic process of the engine 2. The speed also changes.

Therefore, if there is little data processing, it can be printed at high speed, and if there is a lot of data processing, it can be printed at a correspondingly low speed, and it is possible to process and print in real time without having a full page buffer, which is very advantageous in terms of cost. Become.

The operation for making the speed of the electrophotographic process of the engine 2 variable will be explained a little more.

In an electrophotographic process, the process speed is basically determined first, and then other conditions are fixed. Therefore, is it okay to make the process speed variable? Certain conditions must be changed synchronously.

Not only the rotational speed of the photosensitive drum 6 but also the amount of corona current to the corona charger section 7 must be changed accordingly. Otherwise, the initial surface potential will shift and the photosensitivity will change, making it impossible to perform stable printing. On the other hand, the same applies to the corona current in the transfer section 9. For example, if the corona current is fixed and the process speed is increased, the charge density will decrease, causing transfer defects, and if the process speed is slowed down (if the process speed is In this case, the charge density becomes too large, causing reverse dripping and splatter due to discharge, resulting in a significant deterioration in image quality.

It is necessary to control this corona torrent by the control 5 according to the variation of the rotational speed of the photosensitive drum 60.

As described above, according to the present invention, various processes can be performed on the printer side X''i line fx e, without increasing the control.
Moreover, it is possible to make maximum use of the high-speed nature of the printer mechanism.

[Brief explanation of the drawing]

FIG. 1 shows the configuration of the present invention. 1 is an optical signal generator, 2 is an engine, 6 is a data processing unit,
4 is an interface section, 5 is a control section, C is a photosensitive drum, 7
9 is a corona charger section, and 9 is a correction section. Kako 0- Kunita 1st Illustrated biography

Claims (2)

[Claims] (1) An optical signal generator having an H-crystal mital shutter array, an engine that realizes an electrophotographic process,
A printing apparatus comprising a data processing section, an interface section, and a control section that determines a printing speed based on commands from the data processing section and issues instructions to each section. (2) The engine includes at least a photosensitive drum, a corona charger section, a developing device, a transfer section, a cleaning section 9, and a fixing section, and the rotational speed of the photosensitive drum and the corona charger section are controlled by instructions from the control section. Claim 1, characterized in that the corona current supplied to the transfer section is controlled.
Printing device as described in section.