JPS6336184B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a facsimile sending/receiving machine that is highly reliable and economical and is capable of recording on plain paper.

As a conventional transmitting/receiving device, as shown in FIG. 1, one using an electron tube such as a flying spot tube as a scanning device is known. In Fig. 1, 1 is a flying spot tube that generates a scanning spot for one scanning line, 2 is a lens that projects the spot light onto the surface of a transmitted document or the surface of a receiving recording paper, and 3
is a roll of reception recording paper that is ZnO electrophotographic paper,
4 is a developing device; 5 is a charger that discharges by applying a high voltage to uniformly charge the receiving recording paper 3; and 6 is for cutting the rolled receiving recording paper 3 into appropriate lengths. Katsuta, 7 is a storage case for recording paper, 8
1 is a photomultiplier for photoelectrically converting the reflected light from the document illuminated by the scanning spot of the flying spot tube 1; 9 is a transmission document; 10 is a paper feeding roller;
Reference numeral 11 denotes an electric circuit section that changes the brightness according to the intensity of a received signal during a receiving operation.

Next, the operation of this conventional example will be explained. In the case of receiving operation, first the receiving recording paper 3 is moved to the paper feed roller 10.
The paper is fed and uniformly charged by the charger 5. Next, the scanning spot of the flying spot tube 1 scans the three surfaces of the receiving recording paper through the lens 2, but at this time, the scanning spot is modulated in brightness by the received signal in the electric circuit section 11, so the intensity of the scanning spot is In response, the charges on the three surfaces of the receiving recording paper are discharged, forming a latent image. After being developed by the developing device 4 as the paper is fed, it is stored in the storage case 7. Also, in the case of sending operation,
A transmission document 9 is illuminated by a scanning spot light from a flying spot tube 1, and photoelectrically converted by a photomultiplier 8.

Figure 2 shows a conventional example using transfer-type electrophotographic recording that can be recorded on plain paper, and the same reference numerals as in Figure 1 indicate the same things.
Rotating drum 12 coated with photoconductor such as Se, CdS, etc.
13 is a paper feed belt, 14 is a high-voltage power source for transfer, 15 is a fixing device, and 1
6 is a rotating brush.

In the case of reception, the operation of this conventional example is such that when the rotating drum 12 rotates in the direction of the arrow, the rotating drum 12 rotates in the direction of the arrow.
2 is uniformly charged by a charger 5, exposed to light by a scanning spot of a flying spot tube 1, and then a developer powder (toner) is deposited on a rotating drum 12 by a developer 4.
Development is carried out by sprinkling. On the other hand, plain paper (recording paper) 3 is fed out in the direction of the arrow and conveyed to drum 12 by paper feed belt 13. After the image on the drum is transferred to recording paper by the high-voltage transfer power source 14, the transferred image is fixed on the recording paper by the fixing device 15 and stored in the recording paper storage case 7. The remaining developer powder on the drum 12 is cleaned by a rotating brush 16. By repeating this process, recording is performed on the recording paper. In the case of a transmission operation, a transmission original 9 is fed by a paper feed roller 10, a scanning spot scans the surface of the original, and the photomultiplier 8 photoelectrically converts the reflected light.

As explained above, the conventional examples shown in Figures 1 and 2 both use electron tubes such as flying spot tubes, which not only increases the size of the device but also has disadvantages in terms of reliability and economy. Become. Also,
In the case of the transmission operation, a photomultiplier is used, but the photomultiplier requires a high-voltage power supply, has a complicated power supply circuit, and has the disadvantage of being economically disadvantageous.

The present invention provides a transmitting/receiving device using a solid state light emitting element array as a scanning device in order to eliminate the drawbacks of the conventional example. Hereinafter, embodiments will be described in detail with reference to the drawings.

FIG. 3 shows one embodiment of the present invention.
Components with the same reference numerals as in FIG.
The light emitting element array head 17 is placed extremely close to the original or recording paper.

FIG. 4 shows the structure of a light emitting element array head, in which light emitting elements 20 are arranged in a line on a substrate 19 at a density of 4 dots/mm to 8 dots/mm, and these light emitting elements are connected to individual transparent electrodes 21. and the common electrode 22 is sandwiched. Each individual electrode is provided with a switch 23 for sequentially driving the light emitting elements 20. 24 is a power source for lighting the light emitting element; 25 is a switch for switching between transmission and reception operations; 2
6 is an input terminal for a received signal, and 27 is a photoelectric conversion element such as Se or Si used during a transmission operation, which is formed uniformly to the same extent as the length of the light emitting element array. 28 is an electrode on one side of the photoelectric conversion element, 29 is a power source for the photoelectric conversion element, 30 is a load resistor, and 31 is an output terminal of the photoelectric conversion element.

Next, the operation of this embodiment will be explained. First, in the case of a reception operation, the light emitting array head turns on the changeover switch 25, so that the reception signal applied from the terminal 26 is sequentially turned on.
3, the light is emitted sequentially while the light emission intensity is modulated by this received signal. This light emitting spot is guided to a rotating drum 12 which is uniformly charged by a charger 5, and exposes this rotating drum 12 to light. Due to this exposure, the electrical charges on the drum 12 are lost, and the charges in the unexposed areas remain on the drum 12, so the developer powder (toner) having the opposite polarity to this electrical charge is used in the developing device 4. If you sprinkle it,
A visible image is formed on drum 12. On the other hand, since the recording paper 3 is conveyed on the conveying belt in the direction of the arrow, the visible image on the drum is transferred onto the recording paper 3 by driving the transfer high-voltage power supply 14.
After being transferred, it is fixed by the fixing device 15 and transferred to the storage case 7. Finally, the remaining developer powder on the drum is cleaned by the rotating brush 16.

In the case of a transmission operation, the transmission document 9 is set facing upward in FIG. 3 and is conveyed by the paper feed roller 10 in the direction of the arrow. The photoelectric conversion operation is performed as follows. First, select switch 2 in Figure 4.
When the switch 5 is turned off and the switches 23 are turned on one after another, the light emitting elements 20 are turned on one after another. These sequentially lit light emitting spots are guided to the transmission document 9 and illuminated with minute spot light. This illuminated manuscript 9
The reflected light from the photoelectric conversion element 2 on the same substrate 19
Guided by 7. This photoelectric conversion element 27 is, for example,
A device that utilizes the photoconductive effect of CdS, Se, etc.
In the figure, a power supply 29, a load resistor 30, one side electrode 28,
Since the photoelectric conversion element 27 and the common electrode 22 constitute a closed circuit, the photoelectric conversion element 27
resistance changes, and a photoelectric conversion output is taken out from the output terminals 31 on both sides of the load resistor 30. This operation is performed over the entire screen of the transmitted original by feeding the original, and a photoelectric conversion signal for the entire screen is obtained.

In this case, we have shown a method of ensuring resolution by simply placing the light emitting element and the recording paper or transmission document very close together, but of course, it is also possible to use optical elements such as fiber arrays or self-cleaning lens arrays. Needless to say, it's a good thing.

As described above, according to the present invention, a light emitting element array is used as a scanning device, and in the case of a transmission operation, the light emitting element array is sequentially driven, a document is scanned by a light emitting spot, and the reflected light is photoconverted by a photoelectric conversion element. Since it is a transmitting/receiving machine that obtains a converted signal and, in the case of receiving operation, sequentially drives the light emitting element array while modulating the intensity with the received signal and records on the receiving recording paper, it does not fly like the conventional method. Compared to using a spot tube, the lifespan is longer.
It is possible to construct a highly reliable facsimile sending/receiving device.

[Brief explanation of the drawing]

1 and 2 are block diagrams of a conventional facsimile transmitter/receiver, FIG. 3 is a block diagram of an embodiment of the present invention, and FIG. 4 shows the structure of a light emitting element array head. This is a diagram. 3...Recording paper, 4...Developer, 5...Charger,
7... Record preservation case, 9... Transmission manuscript, 10...
...Paper feed roller, 12...Rotating drum, 13...
...Paper feed belt, 14...High voltage power supply for transfer, 15
... Fixing device, 16 ... Rotating brush, 17 ... Light emitting element array head, 18 ... Light emitting element array drive circuit.

Claims (1)

[Claims] 1. A light emitting element array arranged in a line with the same dimensions as the width of the original (recording paper) and one photoelectric conversion element having a length comparable to that of the light emitting element array are integrated on the same substrate as the light emitting element array. The formed scanning device is installed close to the original (recording paper), and when transmitting and reading, the light emitting element array and photoelectric conversion element are operated to obtain a photoelectric conversion signal array, and when receiving and recording, the light emitted from the light emitting element is intensity-modulated. A scanning device for both transmitting and receiving purposes.