JPS6311825B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a light receiving device, and particularly to a light receiving device suitable for use in a light receiving section of a facsimile machine, a character reading device, and the like. By using this light-receiving device, the device can be made smaller without taking up much space.
Also, it can easily be hung on a wall.

FIG. 1 shows a block diagram of a conventionally used facsimile transmitter. In the figure, 1 is the original,
2 is a document surface, 3 is a document feed roller, 4 is a fluorescent lamp, 5 is a document holding glass, 6 is a lens, 7 is a silicon IC light receiving element, and 8 is the front surface of the apparatus. As you can see from this diagram, conventional equipment uses silicon
An IC light receiving element 7 is used, and this silicon
Because there is a limit to the length of the IC photodetector (20 to 30
mm) A lens 6 is used to reduce the original image 1, and an image is formed on this element 7 and read. This method has the disadvantage that the optical system occupies a large volume, making the device large in length, width, and height, and that it takes up a large space to place the device. Also, conventionally,
When inserting or moving a document, the table on which the device is placed and the surface of the document face each other in parallel. This requires the width of the device to be greater than the width of the minimum original, which also requires a large space.

The present invention has been made in order to eliminate the drawbacks of the above-mentioned conventional devices.

That is, (1) it has a contact type light-receiving element and a casing that houses the light-receiving element and has a document insertion port and a document ejection port, and the dimension of the casing in the direction perpendicular to the document surface is equal to that of the casing. one of the document insertion port and the document discharge port is located at the top of the housing, and the other of the document insertion port and the document discharge port is located at the top of the housing. (2) a contact-type light-receiving element, and a document insertion port and document ejection port that accommodate the light-receiving device; a housing, a dimension of the housing in a direction perpendicular to the document surface is smaller than a dimension of the housing in a direction parallel to the document surface, and one of the document insertion port and the document ejection port is a light receiving device that is located on a side of the housing, the other of the document insertion port and the document ejection port is also located on the side of the housing, and the light receiving element is provided in front of a document feeding path; (3) having a contact type light-receiving element and a casing that houses the light-receiving element and has a document insertion port and document discharge port;
A dimension of the casing in a direction perpendicular to the document surface is smaller than a dimension of the casing in a direction parallel to the document surface, and the document insertion port and document ejection port are located at the top or bottom of the casing, The light-receiving element may be a light-receiving device provided in front of the document feeding path, or (4) may include a contact-type light-receiving element and a casing that accommodates the light-receiving element and has a document insertion port and document ejection port. death,
The dimension of the casing in the direction perpendicular to the document surface is smaller than the dimension of the casing in the direction parallel to the document surface, the document insertion port and document ejection port are located on the side of the casing, The light receiving element is a light receiving device that is provided in front of the document feeding path. The light receiving device described above may further include a recording device having at least a thermosensitive recording head or an electrostatic recording head. A contact type photodetector suitable for this purpose uses an optical fiber embedded in a substrate as an information transmission means, and a photodetector with photoelectric conversion elements arranged one-dimensionally on the top of the optical fiber, or a light-focusing optical fiber and a primary A light receiving element that is integrated with the original photoelectric conversion element array is optimal. This example is shown in Figures 2 and 3.
Each is shown in the figure. FIGS. 2a and 2b are a sectional view and a plan view, respectively, of a one-dimensional photoelectric conversion element array provided on an optical fiber substrate. In the figure, 9 is an optical fiber with a fiber diameter of about 5 μm to 100 μm placed at a distance of 40° from the substrate surface.
These are rows of optical fibers arranged closely at angles of 80 to 80 degrees. Reference numeral 10 denotes an insulating plate made of glass or the like, which is integrated with the fiber array 9 by adhesion or fusion. Reference numeral 11 denotes a light source for illumination, which uses an elongated tungsten lamp, a fluorescent lamp, a linearly arranged light emitting diode array, or the like. Note that the light receiving length is in the direction perpendicular to the paper surface of the drawing. 12 is a document, and 13 is a striped transparent electrode. The portion of the transparent electrode other than the tip is covered with a metal electrode 14 to block light. A semiconductor film 15 is formed thereon, and finally a metal common electrode 16 is provided. After all, transparent electrode 1
A one-dimensional photoelectric conversion element array consisting of 3-semiconductor film 15-metal common electrode 16 is formed. The metal electrode 16 becomes a common electrode of the one-dimensional photoelectric conversion element array. As the semiconductor film, a deposited film of a Se-As-Te based amorphous semiconductor, a deposited film of amorphous silicon, a film of CdSe, CdTe, ZnSe, ZnTe, or PbS is used. Light emitted from the illumination light source 11 is scattered by the original 12, and a portion of the scattered light enters the optical fiber array 9, enters the photoelectric conversion element, and is photoelectrically converted. FIGS. 3a and 3b are a cross-sectional view and a plan view of a one-dimensional photoelectric conversion element array using 20 light-focusing optical fibers (commercially available under the name of self-occurring lenses). In this case, the light-focusing optical fiber array 20 is arranged parallel to the surface of the original 12. 19 is glass, and one end is a mirror 18. As shown by the arrow in the figure, the illumination light source 11
The light emitted from the is scattered by the original painting. This scattered light is imaged by the mirror 18 and the light-focusing optical fiber array 20 onto a one-dimensional photoelectric conversion element array consisting of 13 to 16, and is photoelectrically converted. Note 13-1
6 has the same configuration as in FIG. The positions of the original 12, the mirror 18, the light-focusing optical fiber array 20, and the photoelectric conversion element array are determined so that the characters on the original are imaged on the photoelectric conversion element. Although two examples have been shown above as the light receiving element used in the present invention, it is also possible to use a contact type light receiving element that can be used in close contact with or in close proximity to a document. Using such a contact type photodetector,
Furthermore, when moving the original image, if a light receiving device is created that allows the surface of the original image to be perpendicular to the horizontal plane or at an angle close to perpendicular to the horizontal plane, the width of this light receiving device can be made extremely thin, and the space for use can be saved. You don't have to take it.

Hereinafter, the present invention will be explained in detail with reference to Examples.

Embodiment 1 FIG. 4a is a perspective view of a light receiving device, and FIG. 4b is a configuration diagram inside the light receiving device. 21 in Figure 4a
22 is a cover of the device, 22 is an upper surface of the device, 23 is an insertion slot for a document, and 24 is a wall hanging fitting. As indicated by arrows in the figure, the original is inserted from the top of the device and ejected from the bottom of the device. Of course, the device does not need to be perpendicular to the horizontal plane, as long as it is easy to insert the original from the top. Therefore, the slope θ of inserting the original is
It is sufficient if it is in the range of 45° to 90°. Figure 4b shows the internal configuration. In the figure, 25 is a document, 26 is a paper feed roller for sub-scanning, 27 is a line light source for illumination,
Reference numeral 28 denotes a light receiving element (a contact type light receiving element consisting of a one-dimensional photoelectric conversion element array in which optical fibers are embedded in the aforementioned substrate). An array of light emitting diodes was used as a light source. The original 25 is moved downward little by little by a paper feed roller 26. This original is illuminated by a line light source 27, and scattered light carrying information about the original enters a light receiving element 28, where it is photoelectrically converted and read.

FIG. 4c shows the basic configuration of an optical information reading circuit using a contact type light receiving device.

103 is a photoelectric conversion section made of a semiconductor material, which generally forms a photodiode. 102 is a striped electrode, and 104 is a common electrode. The cross-sectional view and plan view of this light-receiving element are shown in Figures 2a and b.
As shown in The striped electrode 10
2 is connected to a switch circuit 101. Switch circuits generally consist of MOS switches.
105 is an output terminal, 106 is a clock pulse generator, 107 is a shift register, and 108 is a bias voltage. For main scanning, switch circuit 101 is used.
This is done by sequentially switching S ₁ , S ₂ , . . . , S _o-1 , S _o to convert light from the document surface into a train of electrical signals.

Note that the basic configuration for reading optical information is the same in the following embodiments as well.

By moving the document surface perpendicularly or within a plane forming an angle of 45 degrees or less with respect to the vertical plane, an extremely thin light-receiving device can be obtained as in the present light-receiving device. Therefore, this device can be used by hanging it on a wall, etc., and has the great advantage that it does not take up much space.

Embodiment 2 FIG. 5a shows a perspective view of a light receiving device of this embodiment. In the figure, 29 is the paper ejection port on the front of the device, 3
0 is an insertion port on the top surface of the device, and 31 is a wall hanging metal fitting. An internal configuration diagram of this device is shown in FIG. 5b.
In the figure, 32 is a document, 33 is a paper feed roller, 34 is a line light source, 35 is a contact type light receiving element, 36
is the paper feed guide. This embodiment differs from Embodiment 1 in that the paper ejection port is provided at the front. Therefore, it can of course be used not only on a wall but also on a stand. In this case as well, θ is preferably in the range of 45° to 90°.

Embodiment 3 FIG. 6a shows a perspective view of a light receiving device. Reference numeral 37 designates a device cover, and 38 designates a document insertion and paper ejection port provided on the top surface of the device. The original is inserted from above through the insertion slot 38 as indicated by the arrow in the figure, and is ejected from there. FIG. 6b shows the internal configuration of the device. In the figure, 39 is a paper feed roller, 40
41 is a contact type light receiving element, 41 is a line light source for illumination, 42 is a spring, 43 is an electromagnet, 44 is an iron piece, 45 is a fulcrum, 46 is a roller support rod, 47 is a light source (for example, a light emitting diode), and 48 is a photoelectric conversion element ( 47 and 48 are used to detect the position of the document. When there is no document, the paired paper feed rollers are open as shown in FIG. 6b. Therefore, the original can be easily inserted from above. As shown in FIG. 6c, when the document 49 is completely inserted, the document is placed between the light emitting diode 47 and the photodiode 48, so that the output signal of the photodiode 48 becomes zero.
At this time, when a current is applied to the electromagnet 43, the iron piece 44 is attracted to the electromagnet, so that the roller 39 and the original 4
Closely related to 9. At the same time, the rollers are rotated to move the document 49 upward. The document moving upward is irradiated by a line light source 41, photoelectrically converted by a light receiving element 40, converted into an electrical signal, and read. As explained above, this light receiving device inserts a document by dropping it from above, and reads the document while ejecting it upward. This device can be used wall-mounted or placed on a table. θ is still
Preferably between 45° and 95°.

Note that a paper discharge port may be provided at the upper part of the front face of the apparatus, and when paper is discharged upward, the paper may be discharged to the front using a paper feed guide.

Embodiment 4 FIG. 7a shows a perspective view of a light receiving device. 50 is a device cover, and 51 is a document insertion slot on the top surface of the device, into which a document is inserted in the direction of the arrow. Reference numeral 52 denotes a paper discharge port located on the side surface of the apparatus (that is, the wall surface of the apparatus in a direction perpendicular to the vertical direction within the document surface), and the paper is discharged in the direction of the arrow. FIG. 7b shows the internal configuration of the device. 53 is a document, 54 is a paper feed roller, 55
5 is a line light source, 56 is a contact type light receiving element, and 57 is a document position detector. In exactly the same manner as in Example 3, when there is no original 53, the space between the two pair of rollers is left open, and the original 5 is removed.
3 is inserted, the document position detector detects that the document has been inserted, the roller 54 and the document 53 come into close contact, and the document 53 moves toward the front of the apparatus. 55 is a line light source, and 56 is a light receiving device. This device is characterized by the fact that originals are inserted from above and are ejected to the side of the device. Further, for paper ejection, a paper feed guide and a paper ejection port may be provided on one side of the front surface of the apparatus, and the paper may be ejected to the front surface of the apparatus.
θ is preferably between 45° and 90°, and it can also be wall-mounted.
It can also be used by placing it on a table.

Example 5 FIG. 8a shows a perspective view of a light receiving device. 58 is a cover of the device 58, 59 is a cover on the top surface of the device, 60
61 is an insertion port on the side of the device, and 61 is a paper discharge port on the other side of the device. FIG. 8b shows the internal configuration of the device. 62 is a paper feeding roller, 63 is a line light source for illumination, 64 is a contact type light receiving element, and 65 is a document. A document 65 is inserted through the insertion slot 60, moved in the direction indicated by the arrow in the figure by a paper feed roller 62, illuminated by a line light source 63, converted into an electrical signal by a light receiving element 64, and read. It will be done. The feature of this light-receiving device is that the document is inserted into the device in an upright position from one side and ejected from the other side. This light receiving device can be used either as a wall-mounted type or placed on a stand. Further, for paper ejection, a paper feed guide and a paper ejection port may be provided on one side of the front surface of the apparatus, and the paper may be ejected to the front surface of the apparatus. In the figure, θ is preferably approximately 90°.

Embodiment 6 FIG. 9a shows a perspective view of a light receiving device. 66 is a side surface of the device, 67 is a top surface of the device, and 68 is a port located on the side surface of the device that serves both as a document insertion slot and a paper discharge port. The original is inserted from the side as shown by the arrow in the figure, and taken out from the side. FIG. 9b shows the internal configuration of the device.
In the figure, 69 is a paper feed roller, 70 is a line light source for illumination, 71 is a contact light receiving element, 72 is a document, and 73 is a document position detector. A document 72 is inserted from the side of the apparatus, is fed laterally by a paper feed roller, is illuminated by a line light source 70, and is converted into an electrical signal by a light receiving element 71 and read. When the document has been fed to the end, it is detected by the position detector 73, and the paper feed roller reverses to send the document toward the insertion slot. At this time, the linear light source 70 and the light receiving element 71 do not operate. This device is particularly effective when the storage space is small and paper cannot be ejected backwards. Further, for paper ejection, a paper feed guide and a paper ejection port may be provided on one side of the front surface of the apparatus, and the paper may be ejected to the front surface of the apparatus. It can be used either wall-mounted or placed on a stand, and although it is preferable that the angle θ be close to 90°, there is no particular restriction.

Embodiment 7 This embodiment is an example in which the light receiving device of the present invention is applied to a telephone facsimile device.

This is a telephone facsimile device that combines the light receiving device of Example 3 and a recording device having a thermal recording head or an electrostatic recording head. FIG. 10 shows a sketch of this device. First, the transmitting section, that is, the light receiving section will be explained. 74 is a cover of the apparatus, 75 is a document, and 76 is an opening for inserting and discharging a document. 77 is a paper feeding roller, 78 is a contact type light receiving element, and 79 is an illumination light source. The operation is exactly the same as that described in the third embodiment. On the other hand, to explain the recording section which is a light receiving section, 80 is a paper feeding roller, and 81 is a thermal recording head or an electrostatic recording head. 82 is a recording paper roll.
The recording paper 83 is taken out upward from the paper discharge port 84. 85 is a telephone stand, and 86 is a telephone set. By configuring the document to be read by moving it at an almost vertical angle, the width of the facsimile device can be reduced, so that the space occupied by the device can be reduced. Although the recording paper is taken out from above here, it can also be taken out from the side. This is shown in FIG. The configuration is the same as that shown in FIG. 10 except that the recording paper is taken out from the side. In this example, the configuration of the light receiving device of Example 3 is described in the facsimile light receiving section, but in Example 4,
The configurations of Examples 5 and 6 can also be used in the same manner.

As is clear from the above description, according to the present invention, it is possible to provide a light receiving device that can be used even when hung on a wall, and does not take up much space even when used even when placed on a stand. In particular, it can be used satisfactorily as a light receiving device used in a narrow space, such as a home telephone facsimile device.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram of a conventionally used facsimile transmitter, and FIGS. 2a and 2b are a cross-sectional view and a plan view of a one-dimensional photoelectric conversion element array formed on a substrate in which each optical fiber is embedded. Figures 3a and 3b are a cross-sectional view and a plan view of a one-dimensional photoelectric conversion element array integrated with a light-focusing optical fiber array, respectively. 5 is a perspective view of a light-receiving device that ejects a document, a diagram showing the internal configuration of the device, a diagram showing an example of an information reading circuit of a light-receiving element, and FIG. Figure 6
The figure shows a light-receiving device that inserts a document from above and discharges the document upward; FIG. 7 illustrates a light-receiver device that inserts a document from above and discharges the document from the side;
The figure is a diagram explaining a light receiving device that inserts a document from the side and discharges the document to the opposite surface, FIG. 9 is a diagram explaining the light receiving device that inserts and discharges a document from the side,
The figure is a perspective view of a facsimile device that discharges recording paper upward, and FIG. 11 is a perspective view of a facsimile device that discharges recording paper sideways. In the figure, 26, 33, 39, 54, 62,
69,77,...Paper feed roller, 27,3
4, 41, 55, 63, 70, 79... Light source for illumination, 28, 35, 40, 56, 64, 71, 78
...Contact type photodetector, 25, 32, 49, 53,
65, 72, 75...Manuscript.

Claims (1)

[Scope of Claims] 1. A contact type light-receiving element, and a casing that houses the light-receiving element and has a document insertion port and a document ejection port, and the dimension of the casing in the direction perpendicular to the document surface is: smaller than the dimension of the housing in a direction parallel to the document surface, one of the document insertion port and the document discharge port is located at the top of the housing, and the other of the document insertion port and the document discharge port is located at the top of the document surface. A light receiving device, wherein the light receiving device is located at a lower part of a housing, and the light receiving element is provided in front of a document feeding path. 2. The light-receiving device according to claim 1, comprising a recording device having at least a thermal recording head or an electrostatic recording head. 3 has a contact type light receiving element and a housing that houses the light receiving element and has a document insertion port and a document ejection port, and the dimension of the housing in a direction perpendicular to the document surface is the same as that of the document of the housing. smaller than the dimension in the direction parallel to the plane, one of the document insertion port and the document discharge port is located on a side of the housing, and the other of the document insertion port and the document discharge port is also located on a side of the housing. 2. A light-receiving device, wherein the light-receiving element is provided in front of a document feeding path. 4. The light receiving device according to claim 3, characterized in that it has a recording device having at least a thermal recording head or an electrostatic recording head. 5 has a contact type light-receiving element and a housing that accommodates the light-receiving element and has a document insertion port and a document ejection port, and the dimension of the housing in a direction perpendicular to the document surface is equal to the document surface of the housing. , the document insertion port and document discharge port are located at the top or bottom of the housing, and the light receiving element is provided in front of the document feeding path. Device. 6. The light-receiving device according to claim 5, comprising a recording device having at least a thermal recording head or an electrostatic recording head. 7 has a contact type light receiving element and a casing that houses the light receiving element and has a document insertion port and a document ejection port, and a dimension of the casing in a direction perpendicular to the document surface is equal to A light-receiving device characterized in that the size of the light-receiving device is smaller than the dimension in a parallel direction, the document insertion port and document discharge port are located on a side of the housing, and the light-receiving element is provided in front of a document feeding path. 8. A light-receiving device according to claim 7, characterized in that it has a recording device having at least a thermal recording head or an electrostatic recording head.