JPS59204059A - Copying machine provided with output function of digital signal - Google Patents

Abstract

PURPOSE:To obtain comparatively easily and at low cost the functon as an output printer of a digital signal by constituting an erase lamp of the collection of light emitting body consisting of small parts. CONSTITUTION:A photosensitive body is electrified uniformly, a light from a main exposure light source is irradiated to a copying original on an original platen, its reflected light is to the electrified photosensitive body and exposed, an electrostatic latent image of an original image carried on the photosenitive body is visualized, and thereafter, also it is transferred to a recording paper, and an usual copy mode of an original for obtaining a recording picture operated. In addition to each member placed around a photosensitive drum, an erase lamp 9 which is extended in the axial direction of the photosensitive drum 1 and constituted of the collection body of a small light emitting part is placed between an electrifying charger 3 and an exposing part 4. The erase lamp 9 is formed by arranging many light emitting segments 9a being a small light emitting part, by (n) rows (n>=1), and desirably, that formed by arranging two rows - about 20 rows is used in the axial direction of the photosensitive drum 1. Its array density is six - eight pieces/mm. in the axial direction.

Description

[Detailed Description of the Invention] (Technical Field) The present invention relates to a copying machine with a digital signal output function,
More specifically, the present invention relates to a copying machine with an output function that is applied to electronic computers and facsimile terminals.

(Prior art) Conventionally, a lifting platform that generates electrostatic a-destruction of information other than the document information on the document table on a photoconductor has been used, for example, in the case of
As shown in Publication No. 57, a digital ζ-turn is formed using a liquid crystal on or inside the base glass, and this is placed in the main optical system and imaged on a photoreceptor. There is also a method in which a light source for pattern formation is provided after the charger around the photoreceptor drum.

However, when a liquid crystal is used on a part of the platen glass as in the former method, the transmittance of the segment pattern part is slightly different from other parts even when no voltage is applied. The 177th part of the pattern may form an image and appear on the image, which has a negative impact on the image quality. Moreover, to avoid this, it is necessary to shift the position of the document on the liquid crystal part, which is troublesome.

On the other hand, like the latter method, a transmissive liquid crystal display (LCI)
) or transmission electrochromic display (+>cD
) as a light source, it is installed in a small space around the photoreceptor drum, and other σ) units such as development, cleaning, transfer separation Charshark! 1
．． It is preferable that constraints are placed on the 0 arrangement FJ, and it is preferable to create an image of the electrostatic charge pattern corresponding to the digital signal, such as the original copying machine (in addition to the good performance, laser pulling). , Addition to visualize this 1. A relatively simple copying machine that has all the functions and is easy to operate. Figure 1 shows the configuration around the photoreceptor drum of a copying machine to which the present invention is applied.
Basically, the structure around the photosensitive drum of a conventional copying machine is the same.

That is, around the photosensitive drum 1, charges 4. -3, exposure section 4, development section 5, transfer separation charger 6, cleaning unit, door, and static elimination lamp 8% are located.

With the above configuration, the photoreceptor is uniformly charged and the original (116
The copy original on the table is irradiated with light from the main exposure light source, and the reflected light is guided to the charged photoreceptor for exposure. After visualizing the electrostatic latent image of the original image supported on the photoreceptor, Transfer to recording paper and record ++! j GJ! ) is operated in the normal original copy mode.

In addition to the members arranged around the photoreceptor drum, in the present invention, a collection of small light emitting parts extending in the axial direction of the photoreceptor drum 1 is provided between the charging charger 3 and the exposure part 4. Erase lamps 9 are arranged.

The erase lamp 9 according to the present invention has a large number of light emitting segments 9a as small light emitting parts arranged in n (n≧1) rows, preferably 2 to 20 rows in the axial direction of the photoreceptor drum 1. The items listed up to the top are used. The arrangement density is 6-8 pieces/mm in the axial direction.

Turning on and off each light emitting segment is relatively easy!
An example of a lamp capable of producing 1 ml is a graphics type plasma display panel.

If this is used as the in-slung 9, it can be made relatively small. A case in which this lamp is used will be explained below in order.

For example, when the erase lamp 9 is used to remove excess charge from the original non-image area in a normal document copy mode, the non-image area on the photoconductor may be Light is selectively emitted only in the axial direction of the photoreceptor drum 1, and the charge is removed. father,
At the leading edge of the image or at the e-ZIA (also for the charge of interest), all light-emitting segments are illuminated in the axial direction, allowing the charge to be removed.

These functions are no different from the I/-slump functions of ordinary copying machines.

Next, 4? of the present invention? In the case of digital mode, which is a typical feature, the operation panel on the top panel of the copier body or
The photoreceptor is charged with on/off signals in response to tintal character signals and graphic signals from an external keyboard connected by wire or an input information source such as an external memory. Negative light is emitted with respect to the signal pattern in the exposed portion, and an electrostatic latent image of the bong is formed.

Here, when the erase lamp 9 is provided very close to the photoreceptor, the turning on/off butter 7 in the valley light emitting segment is formed as an electrostatic latent image on the photoreceptor. If it is separated from the photoreceptor surface by a certain distance, for example, 2 mm or more, the optical image will become blurred.
Shagu Jingsu is lost. In this case, a cylindrical lens with high light focusing ability was installed, and the circular distortion of the optical image was optimized to optimize the relationship between the light emission time and the linear velocity of the photoreceptor, so that a circular electrostatic latent image was obtained. In this case, an electrostatic latent image with higher sharpness can be obtained.

Alternatively, another method is to form a light emitting pattern that is expanded in the direction of movement of the photoreceptor in advance, and compress this into a circular shape using cylindrical force to form a spot. Good too.

The timing of light emission in the total/tal mode is performed line by line, and the erase lamp sequentially lights up the signal for each line at intervals of time for the photoreceptor to pass a distance of one line rb. Therefore, the timing of light emission is 1
The smaller the 11J of the line or the faster the rotation speed of the photoreceptor, the shorter it becomes.

No. 1 (The rotational speed of the optical drum 1 is
The off signal is read by the attached memory, and each light emitting segment is turned on by the saved signal, and the time required for emitting the amount of light necessary to reduce the potential on the photoreceptor from, for example, 800V to about 100V is set. receive.

Therefore, by using cylindrical force reflex to create a light image compressed in the rotational direction and irradiating the light image for a certain rotation time of the photoreceptor, it is possible to make the electrostatic potential equal vertically and horizontally. obtains favorable results.

According to the diagram of the light emission control program shown in Figure 2, W/R
(WRITE / READ) Signal Rhino 10 to 5 ■
When a digital signal is sent to the data line 13 in an applied state, the digital signal is stored in the control unit 11 including a control circuit and memory, and the potential in the w/R signal line 10 drops to OV. In this state, a voltage is applied to the light emitting segment 9a and light is emitted.

After emitting light for a certain period of time, when a pulse is input to the clear signal line 12, the light emitting segment 9a stops emitting light, and when 5■ is applied to the W/R signal line 10 again, one line of data is read. It will be done.

The timing of applying the voltage of the W/R signal line 10 and the pulse of the clear signal line 12 is determined by each unit around the photoreceptor drum.
When the tip of the charge carrying portion of the photoreceptor rotates to the bottom of the erase unit 7, the first line is lit. At this time, the document exposure optical system is controlled so as not to perform scanning.

1. According to the above process, in digital mode, the erase lamp lights up for the negative part of the character or symbol,
Charge-bearing parts corresponding to characters or symbols are recorded line by line on the photoreceptor, and then visualized by a normal copying process.

The digital mode and the normal original copy mode can be selected by a switch on the operation panel of the copying machine. Furthermore, by using this tit/tal mode, it is also possible to input arbitrary characters and numbers into a part of the copy of the original.

As in the above example, when the photoreceptor is constructed in the form of a belt rather than in the form of a drum, the erase lamp can be constructed as a collection of light-emitting bodies made up of small sensitive areas, making it relatively easy and inexpensive. It is possible to obtain the same function as a laser printer, that is, the function as a digital signal output printer.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram of various parts around a photosensitive drum in a copying machine according to the present invention, and FIG. 2 is a light emission control block diagram applied to the copying machine shown in the above figure. 9... Erase lamp, 9a - Light emitting segment.

Claims (1)

[Scope of Claims] 1. A photoreceptor is uniformly charged, a copy original on a document table is irradiated with light from a main exposure light source, the reflected light is guided to the charged photoreceptor, and the photoreceptor is exposed. In a copying machine that visualizes the electrostatic latent image of the original image carried on it and then transfers it to recording paper to obtain a recorded image, this is used to remove the electric charge on the photoreceptor on the part corresponding to the non-image area of the original. A copying machine with a digital signal output function, characterized in that the erase lamp provided in the photoconductor is configured with +1 row (nml) of small light emitting sections arranged in a direction perpendicular to the moving direction of the photoreceptor. . 2. It should be noted that each of the small light-emitting parts recited in claim 1 is arranged adjacently so as to form an electrostatic latent image of a character or signal on a photoreceptor by selective blinking. A copier with a digital signal output function. 3. A copying machine with a digital signal output function, characterized in that the small light emitting section according to claim 1 is constituted by a graphics type plasma display panel.