JP3604456B2 - Scanner device - Google Patents

Description

[0001]
[Industrial applications]
The present invention relates to a scanner device that photoelectrically converts reflected light from a document to read a document image, and relates to a scanner device used alone or mounted on another device.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, there has been known a scanner device that irradiates an original with light and reads reflected light from the original with a photoelectric conversion element such as a contact sensor or a CCD, for example. It is connected and used, for example, mounted on a copying machine or a facsimile machine.
[0003]
This type of scanner device irradiates a document with light from a light source extending in the main scanning direction, and a plurality of photoelectric conversion elements arranged corresponding to each pixel in the main scanning direction take in the reflected light to reduce the intensity. An original image is read line by line by outputting a corresponding electric signal. The electric signal output from the photoelectric conversion element is a continuous signal sequence for each pixel, and an output at a predetermined timing in the signal is sampled and processed as read data.
[0004]
Such a scanner device is described in, for example, JP-A-61-262360. In this scanner device, by changing the frequency of a sampling clock, it is possible to cope with a change when reading at a desired magnification. A stable reading data sampling operation can be performed.
In addition, other devices for sampling the read data by the scanner device have been proposed, for example, Japanese Patent Application Laid-Open Nos. 3-265369 and 4-57455.
[0005]
[Problems to be solved by the invention]
However, in such a conventional scanner device, if the video waveform (output waveform) of the electric signal output from the photoelectric conversion element is a rectangular wave for each pixel, the output value is within a certain width. Although stable reading data could be obtained by sampling at a fixed timing, the reading speed has been increased with the recent increase in information processing speed, so that the video waveform has lost its shape. There is a problem in that the output image is distorted like a triangular wave, and a difference in sampling timing for each device due to a difference between manufacturing lots or a circuit loss for each device affects an output value, resulting in a difference in a read image.
[0006]
Further, even in the scanner device described in the above publication, since the sampling clock is only changed, this problem similarly becomes a problem when the reading speed is increased.
Therefore, the present invention is to improve the sampling of the read data so as to eliminate the influence on the read data due to the variation of the video waveform and to obtain a stable read image regardless of the increase in the reading speed. Aim.
[0007]
It is still another object of the present invention to easily and accurately obtain an output value of a photoelectric conversion element at the time of a bright output or a dark output so that the adjustment operation can be performed easily and with high accuracy.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, the invention according to claim 1 is a scanner device that irradiates a document with light and reads a document image from the reflected light, and a light source that irradiates the document with light and captures reflected light from the document. A photoelectric conversion element that performs photoelectric conversion and outputs an electric signal, and an adjustment unit that adjusts a sampling timing that uses the electric signal output from the photoelectric conversion element as read data;A reference white member for obtaining an electric signal by the reflected light reflected by the white light, and the adjusting means, when the light source is turned on and the light is irradiated on the reference white member, the light reflected from the member is photoelectrically reflected. The sampling timing is automatically adjusted based on the output value of the converted electric signal and the output value of the electric signal which is reflected from the reference white member and photoelectrically converted when the light source is not turned on, and each output value is adjusted. The present invention is characterized in that the adjustment range is set within a preset adjustment range.
[0009]
The invention according to claim 2 is characterized in that input means for changing the adjustment range is provided.
[0010]
According to a third aspect of the present invention, there is provided transfer means for moving the photoelectric conversion element and the light source with respect to the positioned document, and transporting the document with respect to the photoelectric conversion element and the light source positioned at a predetermined position by the transfer means. And two reading modes for irradiating light on the positioned original or the original to be conveyed and reading the original image from the reflected light, and white light is reflected at different positions for each of the reading modes. A reference white member for obtaining an electric signal based on the reflected light is provided, and the photoelectric conversion element and the light source are automatically moved by the transfer means to a take-in position corresponding to each of the reference white members to take in the reflected light from the member. And a transfer control means for causing the transfer to be performed.
[0011]
According to a fourth aspect of the present invention, when the light source is turned on to irradiate the reference white member with light, the adjustment unit outputs the output value of an electric signal reflected and photoelectrically converted from the member and does not turn on the light source. Sometimes, the sampling timing is automatically adjusted based on the output value of the electrical signal reflected and photoelectrically converted from the reference white member, and the respective output values at both of the capture positions corresponding to each of the reading modes are predetermined. The transfer control means is configured to be within the adjustment range, and the transfer control means is configured to automatically move the light source and the photoelectric conversion element to each of the capture positions by the transfer means.
[0012]
Claim 5The invention is characterized in that when the light source is turned on and the reference white member is irradiated with light, the output value of an electric signal reflected and photoelectrically converted from the reference white member is reflected by the reference white member when the light source is not turned on. And a display unit for displaying the output value of the converted electric signal.
[0013]
[Action]
According to the first aspect of the invention, reflected light having an intensity corresponding to the image illuminated by the light source and reflected from the original is taken into the photoelectric conversion element, and the reflected light is photoelectrically converted into an electric signal having an output value corresponding to the intensity. Is output. Then, the electric signal of the video waveform output from the photoelectric conversion element is sampled to be read data, and the sampling timing can be adjusted by the adjusting means. Therefore, even if the video waveform is distorted, the sampling of the electric signal can be adjusted at an arbitrary timing.
[0015]
According to the first aspect of the present invention,When the light source is turned on and off, the sampling timing is automatically adjusted by the adjustment unit based on both output values of the photoelectrically converted electric signal of the reflected light reflected from the reference white member, and each output value is set in advance. Within the adjustment range. Therefore, the output value of the electric signal serving as read data at the time of bright output and dark output is automatically set within the adjustment range.
[0016]
Claim 2According to the invention of (1), the adjustment range in which the adjustment means automatically makes the adjustment fall within the range can be changed by the input means. Therefore, it is possible to easily change the adjustment range of the output value of the electric signal to be read data according to the state of the apparatus and the adjustment conditions.
Claim 3According to the invention, the photoelectric conversion element and the light source are moved by the transfer means with respect to the positioned document, and the image thereof is read, and the image is read from the document which is transported by the transfer means with respect to the photoelectric conversion element and the light source. The reading means is provided with two types of reading modes. The photoelectric conversion element and the light source are driven by the transfer control means by the transfer control means at a take-in position for taking in the reflected light from the reference white member provided at a different position for each reading mode. Controlled and moved automatically. Therefore, there is no need to manually move the photoelectric conversion element and the light source to the capturing position for each reading mode.
[0017]
Claim 4According to the invention, the light source and the photoelectric conversion element are automatically moved to the capture position for each reading mode by the transfer means, and the photoelectrically converted electric signal of the reflected light reflected from the reference white member when the light source is turned on and off. The sampling timing is automatically adjusted by the adjusting means based on both the output values, and each output value at the capture position is set within a predetermined adjustment range for each reading mode. Therefore, the output value of an electric signal serving as read data when the photoelectric conversion element and the light source are in the bright output and dark output at the capture position in each reading mode is automatically set within the adjustment range.
According to the fifth aspect of the invention, the output value of the electric signal obtained by photoelectrically converting the reflected light reflected from the reference white member when the light source is turned on is displayed on the display means. Therefore, it is possible to easily recognize the output value of the electric signal sampled at an arbitrary timing serving as the read data at the time of bright output. According to the fifth aspect of the present invention, when the light source is turned off, the output value of the electric signal obtained by photoelectrically converting the reflected light reflected from the reference white member is displayed on the display means. Therefore, it is possible to easily recognize the output value of the electric signal sampled at an arbitrary timing serving as the read data at the time of dark output.
[0018]
【Example】
Hereinafter, the present invention will be described with reference to the drawings.
FIGS. 1 to 7 are views showing an example of a facsimile apparatus equipped with an embodiment of the scanner apparatus according to the present invention.
1 to 6, reference numeral 10 denotes a facsimile apparatus. The facsimile apparatus 10 irradiates a document located at a reading position with light and reads image information (read data) to be transmitted or copied by reflected light from the image surface. A scanner 11; a plotter 12 for recording and outputting received or read image information and various reports (for example, error communication and communication management reports) on recording paper P; and a modem 13 for modulating and demodulating image information to be transmitted and various procedural signals. And a communication control unit 15 that transmits and receives image information via a network control device 14 that performs predetermined line control at the time of outgoing / incoming calls and disconnects connection with a telephone line, and read image information to be transmitted and received image information. An image memory 16 for temporarily storing received image information in a compressed state, and reading and outputting the read image information while compressing the image information by a known encoding method; An encoding / decoding unit 17 for decoding information and received image information, reproducing (expanding) the original image information, and outputting the same, a display LCD, LEDs, and operation keys are provided to display the operation state of the apparatus main body and allow the operator to operate the apparatus. An operation display unit 18 for performing various operations and a file for storing parameters and the like required for control and a file for managing image information stored in the image memory 16 are backed up by the battery 19 and can be used even if the power of the apparatus is turned off. A parameter memory 20 in which stored contents are not erased, and a CPU 22 which controls the above components in accordance with software stored in a ROM 21 are connected via a bus 23 for transmitting information such as control commands and data. I have.
[0019]
The facsimile apparatus 10 includes two types of contact glass, on which the original is placed, and a contact glass, through which the conveyed original passes, as the reading positions for reading image information from the original. Although not shown, an original is placed and positioned on a contact glass to and from which a pressure plate 41 supported to be openable and closable at the top of the apparatus main body is separated and read, and image information thereof is read by the scanner 11, A transport unit 42 located on the side and constituting a document transport unit (so-called ADF) separates and feeds the documents one by one from a bundle of documents on a document table 43 and passes over a contact glass to read the image information. Has become. That is, the facsimile machine 10 has two reading modes for reading image information of an image from a positioning document or a conveyed document. The document that has passed through the glass by the transport unit 42 is discharged onto the pressure plate 41 (discharge position).
[0020]
The scanner 11 emits light, for example, a light source (not shown) such as a xenon lamp, a fluorescent lamp, or an LED array, and a CCD that takes in the light, photoelectrically converts the light into an electric signal corresponding to the intensity, and outputs the signal. A photoelectric conversion element 31 such as a contact sensor or a contact sensor is fixed to a contact image sensor unit 44. The contact image sensor unit 44 is guided by a guide rail 45 and a scanner motor 46 is driven via a transmission belt 47 and a transmission gear 48. By driving the traveling belt 49 to rotate, the traveling belt 49 travels in the sub-scanning direction. The scanner 11 emits light from a light source illuminated on a document (eg, a BOOK document) on a contact glass positioned by a pressure plate 41, and a photoelectric conversion element 31 captures reflected light from an image surface of the document to obtain image information. The image information is read out line by line in the main scanning direction, and image information is similarly read from a conveyed document conveyed by the conveyance unit 42 and passed over the contact glass after the contact image sensor unit 44 is moved below the conveyance unit 42. Has become. That is, the transfer means is constituted by the scanner motor 46.
[0021]
The scanner 11 includes a video amplifier 32 that amplifies analog data (image information) of an electric signal output from the photoelectric conversion element 31, an A / D converter 33 that converts the amplified analog data into digital data, A read correction unit 34 for performing basic shading correction, and an image processing unit 35 for performing image processing such as OR processing, MFT correction, and generation of a halftone image. The signal is amplified by a video amplifier 32, converted from analog data to digital data by an A / D converter 33, and transmitted to the bus 23. In the scanner 11, the timing clock generator 36 generates a timing clock for sampling an output value of an electric signal serving as image information from the photoelectric conversion element 31 and other video timing clocks. As shown in FIG. 7, the electric signal from the photoelectric conversion element 31 becomes a video waveform (output waveform) that is not rectangular but loses its shape as the reading speed increases, but the built-in sampling timing adjustment unit 37 By switching the combination of the provided SEL0 to SEL2 and inputting the value to the timing clock generator 36, the sampling timing by the timing clock can be selected and adjusted from eight types of s1 to s8 shown in FIG.
[0022]
In FIGS. 3 and 4, reference numeral 51 denotes a paper feed cassette for storing the recording paper P recorded and output by the plotter 12, reference numeral 52 denotes a discharge table for discharging the recorded recording paper P, and reference numeral 53 denotes a facsimile. The receiver included in the device 10. In FIG. 5, reference numeral 54 denotes a pressure plate detection sensor for detecting opening and closing of the pressure plate 41, 55 an HP sensor for detecting that the contact image sensor unit 44 is located at the home position, and 56 an original placed on the contact glass. Is a document size sensor for detecting the size of a document. In FIG. 6, reference numeral 61 denotes a pick-up roller for calling the original on the original table 43; 62, a feed roller for conveying the called original; Reference numeral 64 denotes a document detection sensor that detects the leading or trailing edge of the conveyed document, 65 denotes a width sensor that detects the width of the conveyed document, and 66 denotes a processed sheet on the recording paper P. Stamp.
[0023]
next,One embodiment will be described.
1 to 6, the scanner 11 can manually switch the combination of SEL0 to SEL2 of the sampling timing adjustment unit 37 by, for example, a dip switch (not shown). The section 37 constitutes an adjusting means of the scanner 11 which constitutes the scanner device of the present embodiment. The value of SEL0 to SEL2 is manually switched to be inputted to the timing clock generating section 36, and s1 to s8 shown in FIG. The sampling timing by the timing clock can be selected and adjusted from eight types. The sampling timing adjuster 37 is not limited to the dip switch, but may be any switch capable of switching from SEL0 to SEL2. For example, the sampling timing adjuster 37 is configured to display the setting of the internal switch on the operation display unit 18 for switching. You may. Further, in the present embodiment, it is configured to select from eight types of timings by SEL0 to SEL2. However, it is needless to say that the present invention is not limited to this and may be increased or decreased.
[0024]
As described above, in the present embodiment, the sampling timing for sampling the electric signal output from the photoelectric conversion element 31 and using the output value as image information is only shown in FIG. 7 by switching SEL0 to SEL2 of the sampling timing adjustment unit 37. It can be selected and adjusted from s1 to s8. Therefore, even if the video waveform of the electric signal output from the photoelectric conversion element 31 is distorted due to the increase in the reading speed, or if the sampling timing is shifted for each device, for example, the video waveform and the sampling By simply switching SEL0 to SEL2 of the sampling timing adjustment unit 37 while observing the clock with an oscilloscope or the like, it is possible to sample an electric signal of an output value having no variation, and easily adjust so as to obtain stable read image information. be able to.
[0025]
next,Claim 5A second embodiment corresponding to the invention will be described.
1 to 6, in addition to the configuration of the above-described embodiment, the scanner 11 includes a reference white plate (reference white) (not shown) for setting the output value of the electric signal output from the photoelectric conversion element 31 within a predetermined adjustment range. Members) are disposed at different positions near the contact glass constituting a reading position for each of the two reading modes (hereinafter also referred to as a BOOK reading mode and an ADF reading mode), and the scanner 11 turns on the light source. After the contact image sensor unit 44 is manually moved to a position (capture position) where light is irradiated to these reference white plates, the reflected light reflected from the reference white plate when the light source is turned on and when the light source is turned off is converted to the photoelectric conversion element 31. The CPU 22 converts the photoelectrically converted output value of the electric signal sampled at the sampling timing set by the sampling timing adjusting unit 37 into an operation table. And it is adapted to display on part 18.
[0026]
When the sampling timing adjustment mode is selected on the operation display section 18 and a start key (not shown) is pressed, the CPU 22 amplifies the video signal by the video amplifier 32 and converts the photoelectric conversion element into digital data by the A / D converter 33. After passing the electric signal output from the read / correction unit 31 through the read correction unit 34 and the image processing unit 35 through a through path, the light source is turned on or off according to the selection of the bright output adjustment or the dark output adjustment, and the A / The output value of the electric signal from the D converter 33 is read and displayed on the display LCD of the operation display unit 18. This reading operation is continuously performed, for example, every 500 msec until the stop key is pressed. It has become. Therefore, by switching the SEL0 to SEL2 of the sampling timing adjustment unit 37 manually while checking the display LCD of the operation display unit 18 during the reading operation, the bright output level and the dark output level of the output values fall within a predetermined adjustment range. The sampling timing can be easily adjusted so that That is, the operation display unit 18 constitutes a display unit. The adjustment of the light output level and the dark output level by the reference white plate when the light source is turned on and off is performed for each of the BOOK reading mode and the ADF reading mode.
[0027]
In this embodiment, the light source is turned on and off so that both the bright output level and the dark output level of the output value are within the adjustment range, and the bright output adjustment and the dark output adjustment are performed in the sampling timing adjustment mode. Although the configuration is such that either one may be used, it goes without saying that the adjustment can be performed with higher accuracy by performing both.
[0028]
As described above, in the present embodiment, when the light source is turned on and off, the output value of the electric signal reflected from the reference white plate and photoelectrically converted by the photoelectric conversion element 31 is displayed on the operation display unit 18, and the bright output level and the dark output level are displayed. Can be easily recognized. Therefore, as in the first embodiment described above, a time delay caused by passing through another device such as an oscilloscope does not occur in the obtained data, and a simple adjustment without a shift between the display and the adjustment is realized. can do.
[0029]
Further, since both the bright output level and the dark output level can be adjusted, the read image information is stabilized even with the photoelectric conversion element 31 having different video waveforms at the time of the bright output and the dark output. be able to.
next,Claim 1 or 2A third embodiment corresponding to the invention will be described.
1 to 6, in the scanner 11, the CPU 22 has an adjusting means for automatically performing the light output adjustment or the dark output adjustment of the second embodiment described above, and the CPU 22 is the operation display unit 18 in the second embodiment. SEL0 to SEL2 of the sampling timing adjustment unit 37 are switched based on the output values of the light source when the light source is turned on and turned off, and the bright output level and the dark output level are adjusted within the adjustment range. . The adjustment range which the CPU 22 adjusts so that the light output level and the dark output level are entered is set in the parameter memory 20. The adjustment range is displayed on the operation display unit 18 so that it can be changed and input. Has become. That is, the operation display unit 18 constitutes an input unit.
[0030]
As shown in the flowchart of FIG. 8, the adjustment by the CPU 22 is performed by manually moving the contact image sensor unit 44 to a position where the light from the light source irradiates the reference white plate used in the BOOK reading mode. When the sampling timing adjustment mode is selected and the start key is pressed (step P1), the count n in the parameter memory 20 is set to 1 (step P2), and the timing n corresponding to the count n (n = n at the first time) According to 1), SEL0 to SEL2 of the sampling timing adjustment unit 37 are switched and set so as to be any one of the sampling timings s1 to s8 (step P3).
[0031]
Next, after the electric signal output from the photoelectric conversion element 31 is made to pass through the reading correction unit 34 and the image processing unit 35 through the pass (step P4), the light source is turned off (step P5), and the video amplifier 32 The output value from the photoelectric conversion element 31 that has been amplified and converted into digital data by the A / D converter 33 is read and stored as a timing n / dark output value in a table in the parameter memory 20 shown in FIG. 9 (step P6). . Next, the light source is turned on (step P7), and similarly, the output value output from the A / D converter 33 from the photoelectric conversion element 31 is read and stored in the parameter memory 20 as timing n / bright output value ( Step P8).
[0032]
Next, it is checked whether the count n has reached 8 or more and the reading up to the timing 8 has been completed (step P9). If not completed, the count n is incremented (n + 1) (step P10), and the process returns to step P3. This is repeated until the reading up to timing 8 is completed. When the process is completed, it is checked whether both the bright output value and the dark output value are within the adjustment range in the parameter memory 20 sequentially from timing 1 of the table stored in the parameter memory 20 (step S1). P11) When the timing n in which both are within the adjustment range is confirmed, the bright output value and the dark output value are displayed on the operation display unit 18, and SEL0 to SEL2 of the sampling timing adjustment unit 37 are switched to change the sampling timing. It is set to one of s1 to s8 (step P12).
[0033]
Then, after that, the contact image sensor unit 44 is manually moved to the position where the light from the light source is irradiated on the reference white plate in the ADF reading mode, and then the bright output value and the bright output value are obtained at the sampling timing adjusted in the previous BOOK reading mode. Check whether both dark output values are within the adjustment range. Needless to say, the adjustment of the sampling timing may be performed in either the BOOK reading mode or the ADF reading mode.
[0034]
As described above, in the present embodiment, in addition to the operation and effect of the above-described second embodiment, the light output level and the dark output level of the electric signal reflected from the reference white plate and photoelectrically converted by the photoelectric conversion element 31 when the light source is turned on and turned off. Are determined to be within the adjustment range in the parameter memory 20 at any of the sampling timings s1 to s8, and are automatically set to timings when both of them fall within the adjustment range. Therefore, the output values at the time of bright output and at the time of dark output can be automatically set within the adjustment range, and a stable read image can be easily obtained.
[0035]
Further, since the adjustment range in the parameter memory 20 automatically set by the CPU 22 within the range can be changed and input from the operation display unit 18, the adjustment range of the output value of the electric signal as the image information can be easily changed. The adjustment range can be changed according to the state of the apparatus and adjustment conditions, and the adjustment range for obtaining a stable read image is widened.
next,Claim 3 or 4A fourth embodiment according to the present invention will be described.
[0036]
1 to 6, a CPU 22 automatically controls the movement of the contact image sensor unit 44 to a position where the reference white plate in the BOOK reading mode or the ADF reading mode of the above-described third embodiment is irradiated with light from a light source. When the sampling timing adjustment mode is selected from the operation display unit 18 and the start key is pressed in step P1 of the third embodiment, the position at which the light from the light source irradiates the reference white plate in the BOOK reading mode. After the contact image sensor unit 44 is automatically moved by driving the scanner motor 46, steps P2 to P12 are performed. Thereafter, the contact image sensor is moved to a position where the reference white plate in the ADF reading mode is irradiated with light from the light source. Similarly, the unit 44 is automatically moved by the drive of the scanner motor 46, and the process proceeds to step P2. It is configured to perform the P12. At this time, a table is prepared so that the timings 1 to 8 / bright output value / dark output value read in both the BOOK reading mode and the ADF reading mode can be stored in the parameter memory 20, and the BOOK reading mode and the After both readings in the ADF reading mode are completed, the timing n which is all within the adjustment range is confirmed and set to one of the sampling timings s1 to s8.
[0037]
As described above, in this embodiment, in addition to the functions and effects of the third embodiment, the contact image sensor unit 44 is automatically moved to the position where the reference white plate in the BOOK reading mode and the ADF reading mode is irradiated with light, and the photoelectric conversion element is moved. Since the sampling timing is automatically set so that both the bright output level and the dark output level of the electric signal photoelectrically converted by 31 fall within the adjustment range in the parameter memory 20, the close contact image is set for each of the BOOK reading mode and the ADF reading mode. There is no need to move the sensor unit 44 manually. In addition, since any of the sampling timings s1 to s8 is set so that the bright output value and the dark output value fall within the adjustment range in both the BOOK reading mode and the ADF reading mode, after the adjustment in the BOOK reading mode is completed. In the ADF reading mode, when the value does not fall within the adjustment range, the adjustment has to be performed again from the BOOK reading mode, but this is not necessary. Therefore, the output values at the time of bright output and dark output can be automatically set within the adjustment range by one adjustment, and a stable read image can be easily obtained.
[0038]
【The invention's effect】
According to the first aspect of the present invention, it is possible to adjust the sampling timing at which an electric signal of a video waveform obtained by photoelectrically converting the reflected light from a document image is used as read data, so that the electric signal can be adjusted even if the video waveform is distorted. Can be sampled at an arbitrary timing, and an electrical signal having a stable output value can be sampled as read data. Therefore, a stable read image can be obtained regardless of the increase in the reading speed.
[0041]
Claim 1According to the invention, when the light source is turned on and off, the sampling timing is automatically adjusted based on the output value of the electric signal based on the reference white at the time of bright output and dark output, and each output value is within the adjustment range. Therefore, the output value of the electric signal serving as read data at the time of bright output and dark output can easily be within the adjustment range, and a stable read image can be easily obtained.
[0042]
Claim 2According to the invention, the adjustment range can be changed and input so that the adjustment unit automatically adjusts the adjustment range so that the adjustment range can be easily changed even when the apparatus state or the adjustment condition changes. And the range of adjustment for obtaining a stable read image is widened.
Claim 3According to the invention, the photoelectric conversion element and the light source are automatically moved to the capture position for capturing the reflected light corresponding to the different reference white in each of the two reading modes for reading the image from the positioning document and from the conveyed document. Therefore, the photoelectric conversion element and the light source can be easily and accurately moved to the take-in position, and an easy and highly accurate adjustment operation can be realized.
[0043]
Claim 4According to the invention of the above, the light source and the photoelectric conversion element are automatically moved to the capture position for each reading mode, and when the light source is turned on and turned off, that is, both of the electric signal based on the reference white at the time of the bright output and the dark output. Since the sampling timing is automatically adjusted based on the output value of each and the output value at the capture position is set within the adjustment range for each reading mode, the output value of the electric signal serving as read data at the time of bright output and dark output is adjusted. The adjustment operation for each reading mode within the adjustment range can be easily and accurately performed, and a stable read image can be obtained.
According to the fifth aspect of the invention, when the light source is turned on, the electric signal obtained by photoelectrically converting the reflected light reflected from the reference white, that is, the output value at the time of bright output is displayed, so that the electric data which becomes read data at the time of bright output is displayed. The output value of the signal can be obtained simply and accurately without passing through another device or the like, and the adjustment operation of the sampling timing can be performed simply and accurately. Therefore, a stable read image can be easily obtained. According to the fifth aspect of the present invention, when the light source is turned off, that is, the output value of the electric signal based on the reference white at the time of dark output is displayed. Accuracy can be obtained, and the adjustment operation can be performed easily and with high accuracy. Thereby, the output values of the read data at the time of the bright output and the dark output can be adjusted, so that a more stable read image can be obtained.
[Brief description of the drawings]
FIG. 1 is a diagram showing an example of a facsimile apparatus equipped with an embodiment of a scanner device according to the present invention, and is a block diagram showing an overall configuration thereof.
FIG. 2 is a block diagram showing a configuration of a main part of the scanner device.
FIG. 3 is a front view showing the appearance of the facsimile machine.
FIG. 4 is a top view showing the appearance of the facsimile machine.
FIG. 5 is an internal configuration diagram illustrating a reading mode by the scanner device.
FIG. 6 is an internal configuration diagram illustrating a reading mode different from that in FIG. 5;
FIG. 7 is a video waveform diagram illustrating data read by the scanner device.
FIG. 8 is a flowchart illustrating adjustment of sampling timing by the scanner device.
FIG. 9 is an explanatory diagram illustrating a table used for adjusting sampling timing by the scanner device.
[Explanation of symbols]
10 Facsimile machine
11 Scanner (scanner device)
12 plotters
18 Operation display unit (display means, input means)
20 Parameter memory
22 CPU (adjustment means, transfer control means)
31 photoelectric conversion element
32 video amplifier
33 A / D converter
34 reading correction unit
35 Image processing unit
36 Timing clock generator
37 Sampling timing adjustment unit (adjustment means)
41 pressure plate
42 Transport unit (transport means)
44 Contact Image Sensor Unit
46 Scanner motor (transportation means)

Claims (5)

A scanner device that irradiates a document with light and reads a document image from reflected light thereof, and a light source that irradiates the document with light, a photoelectric conversion element that captures reflected light from the document, performs photoelectric conversion, and outputs an electric signal, Adjusting means for adjusting the sampling timing of making the electric signal output from the photoelectric conversion element read data ,
Having a reference white member for obtaining an electric signal by the reflected light reflected by white,
The adjusting means, when the light source is turned on and the light is irradiated on the reference white member, is reflected from the reference white member, and the output value of the photoelectrically converted electric signal is reflected from the reference white member when the light source is not turned on. The sampling timing is automatically adjusted based on the output value of the photoelectrically converted electric signal, and each output value is configured to be within a preset adjustment range. Scanner device. 2. The scanner device according to claim 1, further comprising an input unit configured to change the adjustment range. Transfer means for moving the photoelectric conversion element and the light source with respect to the positioned document, and transport means for transporting the document to the photoelectric conversion element and the light source positioned at a predetermined position by the transfer means,
A two-mode reading mode for irradiating the positioned document or the conveyed document with light and reading the document image from the reflected light,
A reference white member for obtaining an electric signal by reflected light reflected by white is provided at a different position for each reading mode,
3. A transfer control means for automatically moving a photoelectric conversion element and a light source by a transfer means at a take-in position corresponding to each of said reference white members and taking in reflected light from said member. Item 3. The scanner device according to Item 2. The adjusting means, when the light source is turned on and the light is irradiated on the reference white member, is reflected from the reference white member, and the output value of the photoelectrically converted electric signal is reflected from the reference white member when the light source is not turned on. A configuration in which the sampling timing is automatically adjusted based on the output value of the photoelectrically converted electric signal, and each output value at both of the capture positions corresponding to each of the reading modes is within a predetermined adjustment range. And
4. The scanner device according to claim 3, wherein the transfer control means is configured to automatically move the light source and the photoelectric conversion element to each of the take-in positions by the transfer means. When the light source is turned on and the reference white member is irradiated with light, the output value of the electrical signal that is reflected and photoelectrically converted from the member is reflected from the reference white member when the light source is not turned on and photoelectrically converted. 5. The scanner device according to claim 1, further comprising display means for displaying an output value of the electric signal.

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