JPH04211558A - Image information input/output device - Google Patents

Abstract

PURPOSE:To obtain the image information input/output device which can reduce its cost while reducing the size of a facsimile device, etc., by integrating the picture information input/output section of the picture information input/output device used for the facsimile device, etc., thereby reducing its size, simplifying the process for production and reducing the cost. CONSTITUTION:This device has a substrate 25 which supports a light receiving element 22 for receiving the light of a light source 21 and a light emitting element 24 for irradiating a photosensitive body 23, a 1st driving circuit 26 which drives the light receiving element 22, a 2nd driving circuit 26 which drives the light emitting element, a 1st near parabolic fiber array 27 which guides the light of the light source 21 received by the light receiving element 22, and a 2nd near parabolic fiber array 28 which guides the light of the light emitting element 24 to be projected to the photosensitive body 23. At least a pair of the light receiving element 22 and the light emitting element 24 are disposed adjacent to each other. At least either of the 1st and 2nd driving circuits and the 1st and 2nd near parabolic fiber arrays are commonly used.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image information input/output device, and more particularly to an image information input/output device that allows an image information reading device and an image information writing device to be integrated.

0002

[Prior Art] In a conventional document reading device, M
OS (Metal Oxide Semiconductor)
tor) and CCD (Charge Coupled D
Previously, a so-called reduced-type optical unit was used, which was a combination of a reading element, an imaging lens, a reflecting mirror, etc., but in recent years, due to the increasing demand for miniaturization, a 1-magnification type optical unit with reading elements arranged to the same size as the original has been used. Optical units composed of image sensors have come to be used. As a reduction type optical unit, there is one shown in FIG. 11, for example.
is a CCD sensor, 2 is a lens, 3 is a fluorescent lamp, and 4 is a document. In addition, as a same-magnification type optical unit, for example,
There is one as shown in FIG. In FIG. 12,
Light is irradiated onto the original 6 from the LED array 5 serving as a light source, and a light receiving element (not shown) of the photosensor section 7 receives the light reflected from the original 6. However, the reflected light from the original 6 is separated and guided by the rod lens array 8 and guided to the light receiving element, so that the original and the light receiving element correspond to each other on a 1:1 basis. As light receiving elements, those using chalcogenide materials such as CdS-CdSe and α-Si films are known. Note that the separation distance between the document and the sensor in FIG. 11 is 300 to 500 mm, and the separation distance in FIG. 12 is approximately 20 mm.

Furthermore, in recent years, optical units have become more compact, and the rod lens array 8 shown in FIG.
A full-contact type, 1-magnification optical unit has been developed that omit this and read image information by placing the reading unit in complete contact with the document. A sectional view of such a same-magnification optical unit is shown in FIG. 13, and the arrangement of the illumination window and light receiving element as seen from the document side is shown in FIG. 14. 13 and 14, a transparent glass substrate 51 has a light shielding layer 5.
2. An insulating layer 53, an adhesive layer 54, and an abrasion-resistant glass layer 55 are formed in this order, and a light receiving element 57 connected to an electrode 56 shown in FIG. 14 is embedded in the adhesive layer 54. When the original 59 is sandwiched between the wear-resistant glass layer 55 and the platen roller 58, the illumination light is incident on the transparent glass substrate 51, and the illumination light that has passed through the illumination window 52a of the light shielding layer 52 is applied to the original 59.
reflected by 9. The reflected light from the original 59 is received by the light receiving element 57 and converted into image information. Note that the constituent material of the light receiving element 57 is the same as that explained in FIG. 12.

On the other hand, as an image information writing device,
Thermal head, electrostatic head, inkjet, and dot impact methods print directly on recording paper, and after forming a latent image on a photoreceptor, a visualized toner image is formed, and the toner image is transferred and fixed on recording paper. There is a method using an electrophotographic process. An example of a device using the latter method is shown in FIG. 15. In FIG. 15, the photoreceptor 1 is scanned by the laser beam of the laser light source 10.
1 to form a latent image on the surface of the photoreceptor 11. In addition, 12 is a polygon mirror, 1
3 is an fθ lens, 14 is a reflecting mirror, and 15 is an optical sensor. The reduced type method is called the LD/raster method and is currently the mainstream method, but in order to meet the demand for miniaturization, LE
D-arrays, light source liquid crystal shutter arrays, and fluorescent display tube dot arrays are being developed.

As mentioned above, development is progressing to make image information reading devices and image information writing devices individually smaller, but with the spread of facsimile machines, scanners, and printers, miniaturization is progressing. As the demand continues to increase, devices that integrate these reading devices and writing devices have been proposed, and image information input/output devices that make it possible to integrate such devices are, for example, disclosed in Japanese Patent Laid-Open No. 1983-1983. The one described in Japanese Patent No. 164667 is known.

[0006]

[Problems to be Solved by the Invention] However, in such conventional image information input/output devices, an image information input section and an image information output section are provided side by side on the same substrate to achieve an integrated structure. Therefore, drive circuits for the light-receiving elements, guide means for guiding light, and the like are not standardized, which is insufficient for downsizing, simplifying the manufacturing process, and reducing costs.

Accordingly, the present invention aims to reduce the size, simplify the manufacturing process, and reduce the manufacturing cost while integrating the image information input/output section, thereby reducing the size and cost of facsimile machines and the like. Its purpose is to provide information input/output devices.

[0008]

[Means for Solving the Problems] In order to solve the above problems, the invention according to claims 1 and 2 provides a substrate that supports a light receiving element that receives light from a light source and a light emitting element that irradiates an irradiated object; A first drive circuit that drives the element, a second drive circuit that drives the light emitting element, a first light guide means that guides the light from the light source that is received by the light receiving element, and a first light guide means that guides the light from the light source that is received by the light receiving element. a second light guide means for guiding light;
In the image information input/output device, at least one pair of the light receiving element and the light emitting element are adjacent to each other, and at least one of the first and second drive circuits and the first and second light guide means are shared. Further, the invention according to claim 2 is characterized in that the light receiving element is constituted by a photoconductor, the light emitting element is constituted by a phosphor, and the phosphor is wired on a substrate. The electrode is connected to the cathode filament, and the cathode filament is connected to the cathode filament. ing.

[0009] In order to solve the above-mentioned problems, the invention according to claims 3 and 4 has a light emitting element that irradiates a photoreceptor with light, and image information is written on the photoreceptor by the irradiation of the light emitting element. an output section; an image information input section that includes a light receiving element that receives reflected light from the original document irradiated by the light source, and that reads image information of the original document by receiving light from the light receiving element;
An image information input/output device comprising: the image information output section and the image information input section integrated together;
The invention is characterized in that the light-emitting element also serves as a light source for illuminating the document, and the invention according to claim 4 is characterized in that the light-emitting element is made of a phosphor, and the phosphor is connected to a wiring on the substrate. The phosphor is connected to the phosphor and the cathode filament, and is placed in a vacuum container containing a cathode filament, and a grid is provided between the phosphor and the cathode filament.
The grid controls the hot electrons emitted from the cathode filament.

0010

[Operation] In the invention according to claims 1 and 2, the first
, at least one of the second drive circuits and the first and second light guide means are shared, and the image information input/output section is integrated. Therefore, miniaturization, simplification of manufacturing process, and reduction in manufacturing cost are achieved.

[0011] In the invention according to claims 3 and 4,
The image information output section and the image information input section are integrated, and the light emitting element also serves as a light source for illuminating the document. Therefore, miniaturization, simplification of manufacturing process, and reduction in manufacturing cost are achieved.

0012

EXAMPLES The present invention will be specifically explained below based on examples. 1 to 4 are diagrams showing a first embodiment of an image information input/output device according to the invention as claimed in claims 1 and 2, and include a facsimile device or a scanner having the functions of reading an original and printing on plain paper. This is an example of application to a dual-purpose printer.

First, the configuration will be explained. 1 to 4, 21 is a light source, and the light source 21 is the platen roller 18.
The light reflected from the original 19 is received by the light receiving element 22. 23 is a photoreceptor as an irradiated object, and the photoreceptor 23 is the light emitting element 2
4. Further, the light receiving element 22 and the light emitting element 24 are supported by an insulating substrate 25.
At least one pair of light emitting elements 2 and 24 are adjacent to each other. A circuit for driving the light receiving element 22 is a first driving circuit,
If the circuit that drives the light emitting element 24 is a second drive circuit,
The first and second drive circuits are shared, and these circuits are constituted by the drive circuit 26 shown in FIG. 27 is a first guide for guiding the light from the light source 21 to be received by the light receiving element 22;
A first light condensing fiber array 28 serves as a light guide means, and a second light condensing fiber array 28 serves as a second light guide means for guiding the light from the light emitting element 24 that is irradiated onto the photoreceptor 23. That is, in this example,
The above-mentioned first and second drive circuits are shared.

The configuration and operation of the light receiving element 22, light emitting element 24, and drive circuit 26 will now be explained in detail. The light receiving element 22 is composed of a photoconductor Rnm, and the light emitting element 24 is composed of a phosphor Fnm. However, n, m=1, 2
, 3. ．． shall be. The photoconductor Rnm is made of a material whose resistance value changes depending on the reception of light, such as Se, CdS, CdSe, Sb2O3, ZnO, P
It consists of bO, ZnTe, ZnS, ZnSe, etc., or a solid solution thereof. Further, the photoconductor Rnm is connected in series with the additional resistor RL, and converts optical information into an electrical signal as a partial voltage with RL. In addition, as shown in FIG. 4, the phosphor F
nm is connected to an electrode wired on the substrate 25, that is, an anode 29, and a cathode filament 30.
A grid 32 is provided between the phosphor Fnm and the cathode filament 30, and the grid 32 controls thermoelectrons emitted from the cathode filament 30. Therefore, these components constitute a so-called fluorescent display tube. Phosphor Fnm
Examples include phosphors for low-speed electron beams used in fluorescent display tubes,
For example, ZnS:Cl+InO3 (emission peak wavelength λp
= 464 nanometers), ZnO:Zn (λp = 505
nanometer), ZnS:Cu, Al+In2O3 (
λp=531 nanometers), ZnS:Au, Al+
In2O3 (λp=551 nanometers), (Znx
, Cd1-x) S: Au, Al+In2O3 (λp is Z
(changes depending on the blending ratio of n and Cd), ZnS:Mn2++I
n2O3 (λp=580 nanometers), SnO2:
Eu3+ (λp=588 nanometers), (Znx,
Cd1-x) S:Ag, Cl+In2O3 (λp is Zn
and Cd) may be used, and photoreceptor 3
It is sufficient to use one whose spectral sensitivity matches the emission peak wavelength of the phosphor. Further, in FIG. 3, 33 is an insulating layer, 34 is a driver, and 35 is a matrix portion.

During a reading operation, a voltage is applied from the circuit A1 shown in FIG. 2 to the photoconductor R1m, and the switch S
1 is sequentially switched to connect to RL, and the resistance value corresponding to the optical signal received by each photoconductor Rnm is read as a voltage difference and used as a read signal. At the time of this reading, the output pins of the circuits A2 to An are in a high impedance state. Next, photoconductors R12, R13 . ．． ．．
．． When the data of R1m is read, send the switch S1 and chip select control signal to the chip select switch S2, set the output pin of circuit A1 to high impedance, switch to circuit A2, and read the same read information as circuit A1 described above. Photoconductors R21, R22. ．． ．． ．．
Obtained from R2m. The above operation may be repeated as many times as necessary. Note that the circuits A1 and A2 have the same circuit configuration. Also, during reading operation, the cathode filament 30 is turned off.
By F, the phosphor Fnm does not emit light and there is no electrical noise due to the inflow of thermoelectrons, so
Even if the light receiving element 2 and the light emitting element 4 are integrated, the reading operation is not subject to optical or electrical interference.

On the other hand, during the writing operation, as shown in FIG.
Thermionic electrons are emitted within the grid 12 and are irradiated onto the phosphor Fnm on the anode 29, causing the phosphor Fnm to emit light. The circuits A1 to An in FIG. 2 function as circuits that output data for turning ON/OFF the voltage applied to the anode 29 to the phosphor Fnm. Furthermore, when emitting light, due to the photoconductor matrix structure, the voltage applied to the anode of the light-emitting (ON) dots may wrap around to the light-emitting (OFF) dots via the photoconductor Rnm, causing the light-emitting dots to emit light. , VL (VL≦−|VG+
By connecting it to Vdd|), wraparound can be prevented, and even if the light receiving element 2 and the light emitting element 4 are integrated, the writing operation will not be affected by electrical interference. In addition,
During a write operation, the light source 21 is turned off.

According to the above configuration, the light receiving element 22
Since the first drive circuit of the light emitting element 24 and the second drive circuit of the light emitting element 24 are shared, it is possible to miniaturize the input/output device, simplify the manufacturing process, and reduce the manufacturing cost. A facsimile machine or the like to which the example is applied can be downsized and costs can be reduced.

Furthermore, even if the drive circuit is shared, optical and electrical interference can be prevented when reading and writing image information as described above, and facsimile machines, etc. performance can be improved. 5 to 7 are diagrams showing a second embodiment of the image information input/output device according to the first and second aspects of the invention. In addition, in FIGS. 5 to 7, the same members as those of the first embodiment shown in FIGS. 1 to 4 are designated by the same reference numerals, and their explanations will be omitted.

In FIG. 5, reference numeral 41 denotes a light-concentrating fiber array. It also serves as a second light guide means for guiding the light emitted from the light emitting element 24. That is, 42 is a photoreceptor or an original to be read, and the photoreceptor or the original to be read 42 is arranged on the same side with respect to the substrate 25, and the emitted or received light is guided by the same light-condensing fiber array 41. That's what I do. However, the anode below the light emitting element 4 is SnO2, In2O3
It is a transparent electrode such as. In addition, in this example, the first,
Of course, the second drive circuits may not be shared but may be separate.

According to the above-described configuration, since the first and second light guide means are shared, that is, they are made common, it is possible to reduce the component cost and miniaturize the input/output device. It is possible to miniaturize a facsimile machine or the like to which this is applied, and reduce costs. Note that, as shown in FIG. 6, the light emitting element 24 may have a structure similar to the mounting structure of the light receiving element 22, and when the light emitting element 24 has a similar structure, the light emitting element 24 may be made of a highly conductive phosphor, for example, Z.
It must be composed of nO phosphor. Furthermore, in the case of a phosphor with low conductivity, a structure as shown in FIG. 7 may be used. In FIG. 7, 43 is a transparent conductive film.

FIGS. 8 to 10 are views showing an embodiment of an image information input/output device according to the third and fourth aspects of the invention. 8 to 10, 71 is an image information output section, and the image information output section 71 has a light emitting element 71a. The light emitting element 71a irradiates light onto the photoreceptor 72 via the same magnification optical lens 70, and the image information output section 71 writes image information onto the photoreceptor 72 by the irradiation of the light emitting element 71a. 73 is an image information input section, and the image information input section 73 has a light receiving element 73a. The light receiving element 73a receives reflected light from a document 74 irradiated by a light source to be described later, and the image information input section 73
The image information of the original document 74 is read by receiving the light. An image information output section 71 and an image information input section 73 are supported by a support base 75 and are integrally configured.

Here, a slit 75a is formed in the support base 75 directly below the light emitting element 71a, and the irradiation light emitted from the light emitting element 71a illuminates the original 74 through the slit 75a, and the light reflected from the original 74 is reflected from the original 74. is the light receiving element 73
The light is received by a. Therefore, the light emitting element 71a also serves as a light source for illuminating the original 74. On the other hand, the detailed configuration of the image information output section 71 is shown in FIG. In FIG. 9, a light emitting element 71a is composed of a phosphor 76, and in a vacuum container 77 that is completely sealed and kept in a high vacuum, thermoelectrons emitted from a cathode filament 78 pass through a grid 79 to an anode. The light is irradiated onto the phosphor 76 formed on the electrode 80, so that the phosphor 76 emits light in the vertical direction in FIG. Such a structure is a so-called fluorescent display tube structure. Also, 81
is a transparent glass substrate, and phosphor dots are arranged in a line array on the transparent glass substrate 81, and the light emission state is controlled by the voltage applied to the lower anode electrode 80. Therefore, similarly to the light emitting element 24 of FIG.
A grid 79 is provided between the phosphor 76 and the cathode filament 78, and the grid 79 controls thermoelectrons emitted from the cathode filament 78. moreover,
A light guiding window 80a is formed in the anode electrode 80, and the downward light emission of the light emitting element 71a in FIGS.
The image information input section 73 is irradiated with the light through the image information input section 73. As the material of the phosphor 76, the above-mentioned phosphor Fnm is used.
Similarly, for example, ZnS:Cl+InO3 (emission peak wavelength λp=464 nm), ZnO:Zn(λ
p=505 nanometers), ZnS:Cu, Al+I
n2O3 (λp=531 nanometers), ZnS:A
u, Al+In2O3 (λp=551 nanometers)
, (Znx, Cd1-x)S:Au, Al+In2O3
(λp changes depending on the blending ratio of Zn and Cd), ZnS:M
n2++In2O3 (λp=580 nanometers),
SnO2:Eu3+ (λp=588 nanometers),
(Znx, Cd1-x)S:Ag,Cl+In2O3(
λp may be changed depending on the blending ratio of Zn and Cd), and the spectral sensitivity range of the photoreceptor 72 may match the emission peak wavelength of the phosphor.

The detailed configuration of the image information input section 73 is shown in FIG.
is shown. In FIG. 10, 91 is a transparent glass substrate;
92 is a light-shielding layer, 92a is a lighting window, 93 is an insulating layer, 94 is an adhesive layer, 95 is a wear-resistant glass layer, and 98 is a platen roller, and these members are the conventional transparent glass shown in FIGS. 13 and 14. It has the same structure as the substrate 51, the light shielding layer 52, the illumination window 52a, the insulating layer 53, the adhesive layer 54, the wear-resistant glass layer 55, and the platen roller 58. When the light emitted downward in FIG. 8 from the light emitting element 71a passes through the slit 75a of the support base 75 and enters the transparent glass substrate 91, the incident light passes through the illumination window 92a and is irradiated onto the original 74. . The light reflected from the original 74 is received by the light receiving elements 73a formed in a line of arrays, and the image information of the original 74 is read as shading. Such a light receiving element 73a
For example, Se, CdS, CdSe, Sb
2O3, ZnO, PbO, ZnTe, ZnS, ZnSe
Alternatively, a photoconductor made of a solid solution of these, or a photoconductor or photodiode using amorphous silicon may be used. Note that the transparent glass substrate 81 of the image information output section 71 and the transparent glass substrate 91 of the image information input section 73 are fixed to the support base 75,
They are assembled so that the warpage of each board is corrected. Furthermore, in an apparatus to which the image information input/output device configured as described above is applied, the light emitting element 71a cannot be used simultaneously in the optical writing mode and the reading mode, and only one of the modes can be selected to emit light. The element 71a is used. When using the light emitting element 71a in the reading mode, the light emitting element 71a is fully emitted or the original 7
4, a preset light emission is applied so as to obtain uniform illuminance.

According to the above configuration, the image information output section 71 and the image information input section 73 are integrated, and the light emitting element 71a also serves as a light source for illuminating the original 74, which is different from the conventional method. is the required LED (Lig
The material cost of a light source dedicated to a light receiving element such as a fluorescent lamp or the like can be reduced, and the space for the light source can also be made unnecessary. therefore,
While integrating the image information input/output section, it is possible to reduce the size, simplify the manufacturing process, and reduce the manufacturing cost, and it is possible to reduce the size and cost of facsimile machines and the like to which this embodiment is applied. can.

[0025]

According to the invention as set forth in claims 1 and 2, at least one of the first and second drive circuits and the first and second light guide means are shared. According to the invention described in claim 3 and claim 4, the image information output section and the image information input section are integrated, and the light emitting element also serves as a light source for illuminating the document, so that the image information input/output section While integrating these, it is possible to reduce the size, simplify the manufacturing process, and reduce manufacturing costs.
It is possible to downsize a facsimile device and the like and reduce costs.

[Brief explanation of the drawing]

FIG. 1 is a schematic configuration diagram showing a first embodiment of an image information input/output device according to the invention as claimed in claims 1 and 2;

FIG. 2 is a diagram showing a drive circuit in FIG. 1.

FIG. 3 is an enlarged view of main parts of the image information input/output device in FIG. 1;

FIG. 4 is a diagram showing a circuit of a light emitting section in FIG. 1.

FIG. 5 is a schematic configuration diagram showing a second embodiment of the image information input/output device according to the invention as claimed in claims 1 and 2;

FIG. 6 is an enlarged view of main parts showing another aspect of the light emitting element in FIG. 5;

FIG. 7 is an enlarged view of a main part showing another aspect of the light emitting element in FIG. 5;

FIG. 8 is a schematic configuration diagram showing an embodiment of an image information input/output device according to the invention as claimed in claims 3 and 4;

FIG. 9 is an enlarged view of a main part of the image information output unit in FIG. 8;

FIG. 10 is an enlarged view of main parts of the image information input section in FIG. 8;

FIG. 11 is a perspective view showing a first example of a conventional image information input device.

FIG. 12 is a perspective view showing a second example of a conventional image information input device.

FIG. 13 is an enlarged view of main parts of a third example of a conventional image information input device.

14 is an enlarged view of main parts for explaining the arrangement of light receiving elements in FIG. 13. FIG.

FIG. 15 is a perspective view showing a conventional image information output device.

[Explanation of symbols]

21 Light source 22 Light receiving element 23 Photoreceptor (illuminated object) 24 Light emitting element 25 Substrate 26 Drive circuit (first, second drive circuit) 27
First light-concentrating fiber array (first light guide means) 28 Second light-concentrating fiber array (second light guide means) 28 Anode (electrode disposed on the substrate) 30
Cathode filament 31 Vacuum container 32 Grid 41 Light-condensing fiber array (first and second light guide means) 71 Image information output section 71a Light emitting element 72 Photoreceptor 73 Image information input section 73a Light receiving element 74 Original 77 Vacuum container 78 Cathode filament 79 Grid 80 Anode electrode (electrode arranged on the substrate)
81 Transparent glass substrate (substrate)

Claims (4)

[Claims] 1. A substrate supporting a light receiving element that receives light from a light source and a light emitting element that irradiates an irradiated object, a first drive circuit that drives the light receiving element, and a second drive circuit that drives the light emitting element. An image information input/output device comprising a first light guide means for guiding light from a light source that is received by a light receiving element, and a second light guide means for guiding light from a light emitting element that is irradiated onto an irradiated object, Image information input/output characterized in that at least one pair of the light receiving element and the light emitting element are adjacent to each other, and at least one of the first and second drive circuits and the first and second light guide means is shared. device. 2. The light-receiving element is composed of a photoconductor, the light-emitting element is composed of a phosphor, the phosphor is connected to an electrode wired on a substrate, and a vacuum container houses a cathode filament. 2. The image information input/output device according to claim 1, wherein a grid is provided between the phosphor and the cathode filament, and the grid controls thermoelectrons emitted from the cathode filament. device. 3. An image information output unit having a light emitting element that irradiates light onto the photoreceptor, and writing image information on the photoreceptor by the irradiation of the light emitting element, and receiving reflected light from the document irradiated by the light source. An image information input/output device including an image information input section having a light receiving element and reading image information of a document by receiving light from the light receiving element, and configured by integrating the image information output section and the image information input section. . An image information input/output device, wherein the light emitting element also serves as a light source for illuminating a document. 4. The light emitting element is composed of a phosphor, the phosphor is connected to an electrode wired on a substrate, and is disposed in a vacuum container containing a cathode filament, and the phosphor and the cathode 4. The image information input/output device according to claim 3, wherein a grid is provided between the filaments, and the grid controls thermoelectrons emitted from the cathode filament.