JPH03107275A - Image scanner device - Google Patents

Abstract

PURPOSE:To read both a reflecting original and a translucent original by arranging a light source for the reflecting original and a sensor unit below an original placing table in a case body, and arranging a light source for the translucent original at a position in an original cover corresponding to the original placing table. CONSTITUTION:In the case of the reading of the reflecting original, a lamp 16 for the reflecting original in the sensor unit 15 arranged below the original placing table 18 in the case 11 is lighted to irradiate the reflecting original 19 on the table 18, and by detecting reflected light by a sensor 17 in the unit 15, image information is read. During reading operation, the unit 15 is moved from the front end to the rear end of the original 19. In the case of the reading of the translucent original, after the lamp 16 in the unit 15 is put out, the lamp 20 for the translucent original arranged at the position in the original cover 12 corresponding to the table 18 is lighted so as to irradiate the transmitted original 19 on the table 18, and by detecting transmitted light by the sensor 17 in the unit 15, the image information is read. During the reading operation, the lamp 20 is moved simultaneously with the unit 15 from the front end to the rear end of the transmitted original 19. An automatic paper feeding device 13 is operated at the time of the reflecting original.

Description

[Detailed description of the invention] 〔overview〕 Regarding image scanner devices.

The object of the present invention is to provide an image scanner device with an automatic paper feeder that can read both reflective originals and transparent originals.

It consists of a housing with a document placement table on its surface, a document cover for holding down the document placed on the document placement table, and an automatic paper feeder for automatically transporting the document onto the document placement table. A sensor unit including a reflective original light source and a sensor is arranged below the original placing table inside the housing, and a transparent original light source is arranged at a position corresponding to the original placing table inside the original cover. do.

[Industrial application field]

The present invention relates to an image scanner device.

[Conventional technology]

FIG. 13 is a diagram showing a conventional image scanner device for reflective originals.

What is shown in the figure is an image scanner device for reflective documents equipped with an automatic paper feeder.

The automatic paper feeder sequentially takes in the documents stacked on the document feed table from the bottom and automatically transports them onto the document table in the main body, and after reading is completed.

It is automatically discharged outside the main unit.

For this reason, in a reflective document image scanner device with an automatic document feeder, after stacking documents and placing them on the document feed tray,
The burden on the user is light even if there are a large number of originals because all that is required is to give reading instructions.

FIG. 14 is a diagram showing a conventional image scanner device for transparent originals.

Since the image scanner device for transparent originals reads transparent originals, it is necessary to provide a light source and a sensor separately on both sides of the original.

In the apparatus shown in FIG. 14, a sensor and a sensor drive system are provided inside the main body, and a transmission unit consisting of a light source and a light source drive system is provided inside the document cover.

[Invention tries to solve! II! ! Conventionally, a reflective original is read by an image scanner for reflective originals, and a transparent original is read by an image scanner for transparent originals. Each used a dedicated image scanner device. As a result, there was a problem in that two image scanner devices had to be installed, one for one reflective original and one for a transparent original.

A first object of the present invention is to solve these problems and provide an image scanner device with an automatic paper feeder that can read both reflective originals and transparent originals.

In addition, in an image scanner device with an automatic paper feeder that can read both reflective originals and transparent originals, 1
A second object is to control the light amount of a light source for reflective originals and the light amount of a light source for transparent originals to be equal, so that stable read images of both reflective originals and transparent originals can be obtained.

Furthermore, when reading transparent originals with an image scanner device equipped with an automatic paper feeder that can read both reflective originals and transparent originals, what happens when a transparent original is read? j [1 without installing a complicated mechanism
Take advantage of your inherent capabilities.

A third object of the present invention is to provide a method for aligning a light source and a sensor that can be performed with high precision.

[Means to solve the problem]

In order to achieve the above object, an image scanner device according to a first aspect of the present invention includes: a housing having two surfaces provided with a document placing table; a document cover for holding down the document placed on the document placing table; It is equipped with an automatic paper feeder for automatically conveying the original onto the original placing table, and a sensor unit including one reflective original light source and a sensor is arranged below the original placing table in the housing.

A light source for a transparent original is disposed within the original cover at a position corresponding to the original placing table.

The image scanner device according to the second aspect of the present invention includes a casing having a document mounting table on its surface, and an s! It is equipped with a document cover to hold down the document placed on it, and an automatic paper feeder to automatically transport the document onto the document table, and two reflective document light sources and a sensor are installed at the bottom of the document table inside the housing. A light source for transparent originals is arranged at a position corresponding to the original table within the original cover, and a light source dimmer circuit for reflective originals is arranged to adjust the light intensity of the light source for reflective originals. , a transparent original light source dimmer circuit for adjusting the light amount of the transparent original light source; 1 means for monitoring the light amount of the reflective original light source; 1 means for monitoring the light amount of the transparent original light source; and 1 reflective original light source. The light source dimmer circuit for reflective originals is controlled so that the output of the means for monitoring the amount of light is equal to the reference value, and the output of the light source for transparent originals is controlled so that the output of the means for monitoring the amount of light for transparent originals is equal to the reference value. and a control circuit for controlling the document light source dimming circuit.

A method for aligning a light source and a sensor according to the third invention is as follows:
When the power is turned on, the light source and sensor are returned to their respective predetermined home positions, and the light source is turned on and fixed at that home position, while the sensor is moved and the sensor output value and the predetermined slice are At the same time, the process of counting the number of pulses from the sensor home position and the sensor output value exceeding the slice level are performed.
The process of writing the number of pulses from the home position to the register and moving the sensor further.

A process of writing the number of pulses from the sensor home position to the register at the point when the sensor output exceeds its peak and becomes smaller than the slice level.

written to a register. The sum of the number of pulses from the sensor home position at the time the sensor output value becomes larger than the slice level and the number of pulses from the sensor home position at the time the sensor output value becomes smaller than the slice level. By dividing by 2, the number of pulses from the sensor home position, which represents the digit 2+ of the light source, is calculated and written to the register, and the sensor is returned to the sensor home position. The read preparation is completed and the reading is completed. At the start, the sensor is written to the register from the sensor home position. The process of moving the light source by the number of pulses from the sensor home position, which represents the position of the light source, and temporarily stopping at that position, and the process of starting reading the transparent original while moving the light source and sensor at the same time and at the same speed. It is configured to go through the following steps.

[For production]

(1) Siege non-canner device according to the first invention This is 1
It is possible to read both reflective originals and ·, originals, and the −, ', & G device transports reflective originals,
The discharge is automated.

The operation will be explained for each function below.

■Operation of the automatic document feeder The originals stacked on the original document feeder are taken in sequentially from the bottom and are automatically conveyed to the original document tray inside the main unit. After reading is completed, the originals are automatically transferred to the outside of the main unit. to be discharged. Therefore, the user only needs to stack the originals (reflective originals) and place them on the original feed tray and then issue a reading instruction.
No effort is required even if there are many manuscripts.

■Reading reflective originals Turn on the light source for reflective originals in the sensor unit located at the bottom of the original placing table in the housing, illuminate the reflective original on the original placing table, and detect one reflected light with the sensor in the sensor unit. The image information is read by

■Reading transparent originals Turn on the light source for transparent originals placed in the position corresponding to the original placing table inside the original cover, illuminate the transparent original on the original placing table, and detect the transmitted light with the sensor in the sensor unit. Read the image information.

(2) Image scanner device according to the second invention, which is
In an image scanner device with an automatic paper feeder capable of reading both a reflective original and a transparent original according to the first invention, the light intensity of the light source for the reflective original and the light intensity of the light source for the transparent original are controlled to be equal to each other. This allows stable read images of both originals and transparent originals to be obtained.

In other words, the light intensity of the 2-reflective original light source and the transparent original light source are monitored, and the control circuit adjusts the reflective original light source so that the light intensity of the 2-reflective original light source and the transparent original light source are both equal to the reference value. Controls the optical circuit and light source dimming circuit for transparent originals.

(3) Alignment method for light source and sensor according to the third invention In reading a transparent original, the light generated by the light source is irradiated onto the transparent original placed on the document mounting table, and the transmitted light from the transparent original is detected. This is done by receiving light with a sensor and reading the image information recorded on the transparent original.

During a reading operation, the light source is separately driven by a light source drive system and the sensor by a sensor drive system.

Therefore, both the light source and the sensor need to be located accurately at the reading start position when reading starts.

Therefore, the three-line system is configured as follows.

(a) When power is turned on When the power is turned on, a first-order process is performed.

■Return the light source and sensor to the light source home position and sensor home position.

■Turn on the light source at the light source home position.

Fix it in that position. In parallel with this, while moving the sensor, the sensor output value is compared with a predetermined slice level, and at the same time, the number of pulses from the sensor home position is counted.

■When the sensor output value becomes larger than the slice level, write the number of pulses from the sensor home position to the register.

■Move the sensor further, and when the sensor output exceeds the peak and becomes smaller than the slice level,
Write the number of pulses from the home position to the register.

■Written to the register. The sum of the number of pulses from the sensor home position when the sensor output value becomes larger than the slice level and the number of pulses from the sensor home position when the sensor output value becomes smaller than the slice level is 2. By dividing by
The number of pulses from the sensor home position, which represents the position of the light source, is calculated and written to the register.

■Return the sensor to the sensor home position.

Reading preparation is completed through each of the above steps.

(b) At the start of reading At the start of reading, a first-order process is performed.

■The sensor is written to the register from the sensor home position. It is moved by the number of pulses from the sensor home position, which represents the position of the light source, and is temporarily stopped at that position.

(2) Start reading the transparent original while moving the light source and sensor at the same speed.

In the above description, the image scanner device was simply referred to as an image scanner device, but the present invention is directed not only to a monochrome image scanner device but also to a color image scanner device.

〔Example〕

FIG. 1 is a diagram showing the external appearance of an image scanner device with an automatic paper feeder capable of reading both reflective originals and transparent originals according to the present invention.

In the figure, ▪ is a housing, 2 is a transmission unit that also serves as a document cover, 3 is an automatic paper feeder, and 4 is a document feed table.

(Embodiment of the first invention) The first invention is an image scanner that can read both reflective originals and transparent originals, and that automates the conveyance and ejection of both reflective originals and transparent originals using an automatic paper feeder. It provides equipment.

The second rEJ is a diagram showing the configuration of an embodiment of the present invention.

In the figure, 11 is a housing, 12 is a transmission unit that also serves as a document cover, 13 is an automatic paper feeder, 171 is a document feed table, 15 is a sensor unit, 16 is a reflective document lamp, 1
7 is a sensor, 18 is an original table, 19 is an original, 20 is a transparent original lamp, 21 is a light diffusion plate, 22 is a feed roller, 23 is a separation roller, and 24 is a discharge roller.

The document cover 12 is placed on the document table 18! 3! This is for holding down the original document 19 placed thereon.

The automatic paper feeder 13 sequentially takes in the originals stacked on the original paper feeder 14 from the bottom, and places them on the original i placing stand 1 in the main body.
8, and after reading is completed, it is automatically transported and discharged outside the 2 main body.

The document feed table 14 is for placing one or a plurality of stacked reflective documents.

The sensor unit 15 consists of one reflective document lamp 16° optical system and a sensor 17, and is driven by a sensor unit drive system (not shown).

The reflective original lamp 16 is turned on when reading a single reflective original, and illuminates the image information surface of the reflective original.

The sensor 17 is composed of a CCD or the like, and receives reflected light from a reflective original or transmitted light from a transparent original, and converts it into an electric signal.

As the original 19, a two-reflection original or a transmission original is used.

The transparent original lamp 20 is turned on to illuminate the transparent original when reading the transparent original, and is driven by a transparent original lamp drive system (not shown).

The light diffusing plate 21 is provided at the portion of the document cover 12 that comes into contact with the document a placing table 18, and is milky white, so that the direct light from the transparent document lamp 20 is directed onto the document placing table 18! ! This is to prevent the light from passing through the placed transparent original and entering the sensor 17 .

The operation of the apparatus according to the embodiment of the present invention shown in FIG. 2 will be explained below.

(1) Operation of the automatic paper feeder 13 The automatic paper feeder 13 operates when the target document is a reflective document.

The M documents stacked on the document feed table 14 are fed one by one into the automatic paper feeder 13 from below by a feed roller 22 . Then, after being separated by two separation rollers 23,
The document is sent onto the document table IB. The original read on the original placing table 18.

Automatic paper feeding bag by discharge roller 24? It is discharged outside 1fla.

(2) Reading of reflective originals The reflective original lamp 16 in the sensor unit 15 arranged at the bottom of the original placing table 18 in the housing 11 is turned on and the reflective original 19 on the original placing table 18 is irradiated with one reflected light. The image information is read by detecting it with the sensor 17 in the sensor unit 15. During the reading operation, the sensor unit 15 moves from the leading edge to the trailing edge of the reflective original 19 to be read.

(3) Reading a transparent original After turning off the reflective original lamp 16 in the sensor unit 15, turn on the transparent original lamp 20 located in the position corresponding to the original placing table 18 in the original cover 12, and turning on the original placing table. Image information is read by illuminating the transparent original 19 on 18 and detecting the transmitted light with a sensor in the sensor unit 15.

During the reading operation, the transparent document lamp 20 moves simultaneously with the sensor unit 15 from the leading edge to the trailing edge of the transparent document 19 to be read.

Next, FIG. 3 shows a system configuration of an image scanner device with an automatic paper feeder capable of reading both reflective originals and transparent originals according to the present invention.

In the figure, 31 is a central control unit, 32 is a sensor, and 3
3 is a video amplifier white/no correction section, 34 is a video data processing section, and 35 is an interface section.

Reference numeral 36 designates a lamp control unit for reflective originals, 37 a lamp control unit for transparent originals, 38 a motor control unit for moving the lamp for transparent originals, 39 a motor control unit for moving the sensor unit, and 40 a control unit for automatic paper feeding device. .

The sensor 32 is composed of a CCD or the like, and receives reflected light from a reflective original or transmitted light from a transparent original, and converts image information recorded on the original into an electrical signal.

The video amplifier white/non-correction unit 33 amplifies the output of the sensor 32 and also corrects the white level and black level.

The video data processing section 34 converts the analog signal output from the video amplifier white/non-correction section 33 into a digital signal, and also performs binarization processing.

The interface section 35 is a section that exchanges data and signals with an external system.

The reflective original lamp control unit 36 turns on and off the 1 reflective original lamp and adjusts the light amount.

The transparent original lamp control unit 37 turns on/off the transparent original lamp and adjusts the amount of light.

The transparent original lamp movement motor control section 38 is.

A transparent original lamp movement motor is controlled to move the transparent original lamp simultaneously with the sensor unit when reading a transparent original.

The sensor unit movement motor control section 39 controls a sensor unit movement motor for moving the sensor unit when reading a document.

The automatic paper feeder control unit 40 takes out the originals stacked on the original document feeder and transports them onto the original document tray.

Controls the automatic paper feeder that ejects scanned originals outside the device.

The reading operation of a reflective original and a transparent original in the system shown in FIG. 3 will be described below.

(1) Reading the reflective original flatbed (see the operation flow diagram in Figure 4) ■Place the reflective original on the original placing table.

(2) The reflective original lamp control section 36 turns on the reflective original lamp.

(2) The reflective original lamp control section 36 adjusts the light intensity of the reflective original lamp to stabilize the light intensity.

■Sensor 32 reads the white reference and black reference.

Based on the results, the video amplifier white/non-correction section 33 corrects the white level and black level.

(2) While moving the sensor unit consisting of the one-reflection original lamp, the optical system, and the sensor 32 under the control of the sensor unit movement motor control section 39.

Sensor 3 detects the reflected light from the image information recording surface of the reflective original.
2, it is converted into a video signal and read.

The sensor unit moves from the leading edge to the trailing edge of one reflective original.

The operations ① to ① are repeated as many times as the number of 0 reflective originals for which flatbed reading of one reflective original is completed when 0 or more.

(2) Reflective document conveyance and reading (see the operation flow diagram in FIG. 5) (2) The reflective document lamp control section 36 turns on the reflective document lamp.

(2) The reflective original lamp control section 36 adjusts the light intensity of the reflective original lamp to stabilize the light intensity.

■Sensor 32 reads the white reference and black reference.

Based on the results, the video amplifier white/non-correction section 33 corrects the white level and black level.

(2) Under the control of the sensor unit moving motor control section 39, the sensor unit is moved to the document conveyance/reading position and then fixed.

■Automatic paper feeder control unit 4 according to instructions from central controller 31
0 operates the automatic paper feeding device, takes out the reflective original stacked on the original feeding table, and transports it onto the sensor unit fixed at the original transport reading position at a speed corresponding to the reading speed.

The sensor 32 converts the reflected light from the image information recording surface of the reflective original that passes over the sensor unit into a video signal and reads the video signal.

The reflective original is conveyed from the leading edge to the trailing edge.

The operation (2) is repeated as many times as the number of zero-reflection originals for which conveyance and reading of one reflection original is completed when the number is 0 or more.

(3) Reading the transparent original (see the operation flow diagram in FIG. 6) ■ Place the transparent original on the original placing table.

(2) The reflective original lamp control section 36 turns off the reflective original lamp.

(2) The transparent original lamp control section 37 turns on the transparent original lamp.

(2) The transparent original lamp control section 37 adjusts the light amount of the transparent original lamp to stabilize the light amount.

■Sensor 32 reads the white reference and black reference.

Based on the results, the video amplifier white/black correction section 33 corrects the white level and black level.

(2) Under the control of the sensor unit moving motor control section 39, while moving the sensor unit, the sensor 32 converts the transmitted light from the transparent original into a video signal and reads the video signal.

The sensor unit moves from the leading edge to the trailing edge of the transparent original.

■With the above steps, reading of one transparent original is completed.

Repeat operations from ■ to ■ for the number of transparent originals.

What has been described above is the sequence of flatbed reading of a transparent original.

(Embodiment of the second invention) The second invention provides an image scanner device with an automatic paper feeder capable of reading both a reflective original and a transparent original according to the first invention, in which the light intensity of one reflective original light source and An object of the present invention is to provide an image scanner device that can stably read images of both a reflective original and a transparent original by controlling the light intensity of a light source for a transparent original to be equal.

FIG. 7 is a diagram showing an example (part 1) of the configuration of the light amount equalization system.

In the figure, 41 is a CCD, and 42 is an amplifier.

43 is an A/D converter, 44 is a white/black level correction circuit, 45 is a peak hold circuit, 46 is an A/D converter, 47 is an MPU, 48 is a reflective original lamp dimming circuit, 4
Reference numeral 9 denotes a lamp dimming circuit for transparent originals, 50 a lamp for reflective originals, and 51 a lamp for transparent originals.

The operation of the light quantity equalization system shown in FIG. 7 will be explained below.

(1) The light amount adjustment CCD 41 of the reflective original lamp 50 is set to 1
The light generated by the reflective document lamp 50 causes the document placement table (
A peak hold circuit 45 holds the peak value of the CCD waveform at that time by reading a white reference provided on the back side of the glass plate constituting the glass plate (see reference numeral 18 in FIG. 2).

The peak value held by the peak hold circuit 45 is converted into a digital value by the A/D converter 46, and the value is converted to a digital value by the A/D converter 46.
The PU 47 monitors and controls the 1-reflection original lamp dimming circuit 48 to adjust the light amount of the reflection original lamp 50 so that it is equal to the reference value.

(2) The light amount adjustment CCD 41 of the transparent document lamp 51
When no original is placed, the light emitted from the transparent original lamp 51 and transmitted through the light diffusion plate (see reference numeral 21 in FIG. 2) is received, and the peak hold circuit 45 stores the peak value of the CCD waveform at that time. Hold.

The peak value held by the peak hold circuit 45 is converted into a digital value by the A/D converter 46, and the value is converted to a digital value by the A/D converter 46.
The PU 47 monitors and controls the transparent original lamp dimmer circuit 49 to adjust the light intensity of the transparent original lamp 51 so that it is equal to the reference value! ff.

FIG. 8 is a diagram showing a configuration example (part 2) of the light amount equalization system.

In the figure, 61 is an MPU, 62 is a reflective original lamp dimmer circuit, 63 is a transparent original lamp dimmer circuit, 64 is a reflective original lamp, 65 is a transparent original lamp, and 66 is a reflective original light amount monitor sensor. .

67 is a light amount monitor sensor for transparent originals, and 68 is an A/D converter.

The operation of the light quantity equalization system shown in FIG. 8 will be explained below.

(1) Light intensity of the reflective original lamp 64! 1! ! ff The output signal of the reflective original light amount monitor sensor 66 placed near the reflective original lamp 64 is converted into a digital value by the A/D converter 68, and the value is monitored by the MPU 61 so that it becomes equal to the reference value. 2. Control the reflective original lamp dimmer circuit 62 to adjust the light intensity of the reflective original lamp 64! 11
1! ff.

(2) Adjusting the light amount of the lamp 65 for transparent originals The output signal of the light amount monitor sensor 67 for transparent originals placed near the lamp 65 for transparent originals is converted into a digital value by the A/D converter 68, and the value is converted into a digital value by the MPU 61. The amount of light from the transparent original lamp 65 is adjusted by controlling the transparent original lamp dimming circuit 63 so that it is monitored and equal to the reference value.

In this system, 1 reflective original light amount monitor sensor 66
and the sensitivity and CCD of the light amount monitor sensor 67 for transparent originals.
In order to correspond to the output, it is necessary to adjust one of the reflective original lamp 64 and the transparent original lamp 65 with reference to the other after the apparatus is assembled. Now, using the reflective original lamp 64 as a reference, one reflective original lamp 64 is turned on at a predetermined dimming value, and the sensitivity and CCD output of the reflective original light amount monitor sensor 66 at that time are measured and recorded.

Then, the lamp 65 for transparent originals is turned on, and the light amount monitor sensor 67 for transparent originals is turned on so that the relationship between the sensitivity of the light amount monitor sensor 67 for transparent originals and the CCD output is the same as when the lamp 64 for reflective originals is turned on. Adjust and fix the output value using a variable resistor. In this way, it is possible to control the light intensity of the single-reflection original lamp 64 and the light intensity of the transmission original lamp 65 to be equal.

(Example of the third invention) FIG. 9 is a diagram showing an example of the one-position alignment method.

In the figure, 71 is a scanner body, 72 is a transmission unit, 73 is a carrier drive system with a CCD, 74 is a lamp drive system, 75 is a carrier with a CCD, 76 is a lamp, and 77 is a CCD.
The home position of the carrier with CD, 78 is the home position of the lamp, 79 is the CCD reading section, and 80 is the reading start position.

The image scanner device targeted by this embodiment is:

A scanner main body 71.A scanner body 71 is provided with a document mounting table on its surface and has a built-in carrier 75 with CCD and a carrier drive system 73 with CCD. A lamp 76 and a lamp drive system 74 are provided to face the document table and illuminate the transparent document.
It is composed of a transmission unit 72 containing a built-in transmission unit.

To read a transparent original, the light generated by the lamp 76 is irradiated onto the transparent original placed on the original table.

This is done by receiving the transmitted light from the transparent original by the CCD reading section 79 and reading the image information recorded on the transparent original.

During the reading operation, the lamp 76 is driven by the lamp drive system 74, and the CCD carrier 75 is driven by the CCD carrier drive system 73.
are driven separately. Therefore, both the lamp 76 and the CCD reading section 79 of the carrier with CCD 75 must be accurately positioned at the reading start position 80 when reading starts.

Hereinafter, one embodiment will be described using FIG. 9 and related operation flow diagrams.

(1) When power is turned on (see Figures 10 and 11) ■Turn on the power.

■ Move lamp 76 to lamp home position 78, CC
The carrier with D 75 is returned to the home position 77 of the carrier with CCD.

The lamp 76 is turned on and fixed in that position.

■While moving the CCD carrier 75 to the right.

The number of pulses from the home position 77 of the carrier with CCD is counted.

(2) Determine whether the CCD output is greater than the slice level P.

If NO, return to the process of (2).

If YES, the process proceeds to the first step (2).

(2) Write the number of pulses (a) from the home position 77 of the carrier with CCD to the register.

■While moving the CCD carrier 75 further to the right,
The number of pulses from the home position 77 of the carrier with CCD is counted.

(2) Determine whether the CCD output is smaller than the slice level P.

If NO, return to the process of (2).

If YES, the process proceeds to the first step (2).

■Stop the movement of the CCD carrier 75.

(2) Write the number of pulses (b) from the home position 77 of the carrier with CCD to the register.

Written to the [phase] register. Number of pulses (a) and C from the home position 77 of the carrier with CCD at the time when the CCD output becomes larger than the slice level P
From the number of pulses (b) from the home position 77 of the carrier with CCD at the time when the CD output becomes smaller than the slice level P.

x-(a+b)/2 Calculate and write X to the register.

X is the number of pulses from the home position 77 of the carrier with CCD at the reading start position 80.

Move the carrier 75 with QCCD to the left.

It is determined whether the QCCD-equipped carrier 75 has come to the CCD-equipped carrier home position 77.

If No, return to the process of (2).

If YES, proceed to the first @ processing.

@Stop the movement of carrier 75 with CCD.

It is fixed at the home position 77 of the carrier with CCD.

After completing 0 or more processes, preparation for reading the transparent original is completed.

(2) When reading a transparent original (see FIG. 12) - After placing the transparent original on the original placing table R, instruct to start reading the original.

(2) The CCD carrier 75 is written to the register from the home position 77 of the CCD carrier. It is moved to the right by the number of pulses (χ) representing the reading start position 80.

- Temporarily stop the movement of the carrier with CCD 75.

(2) Move the lamp 76 and the CCD carrier 75 to the right at the same time and at the same speed.

■The light generated by the lamp 76 is irradiated onto the transparent original.

The CCD reading unit 79 receives transmitted light from the transparent original and converts it into an electrical signal, thereby reading the image information recorded on the transparent original.

■ Finish reading the transparent original.

〔Effect of the invention〕

According to the first invention, it is possible to realize an image scanner device with an automatic paper feeder that can read both reflective originals and transparent originals. That is, since one device can read both a reflective original and a transparent original, the user can select one as needed.

Furthermore, since it is equipped with an automatic paper feeder, the user's effort can be reduced.

As a result, the applications of the image scanner device have been further expanded.

According to the second invention, in the image scanner device according to the first invention, the light amount of the two-reflection document light source and the light amount of the transmission document light source are equal.

Stable read images of both reflective originals and transparent originals can be obtained.

According to the third invention, when reading a transparent original with the image scanner device according to the first invention or the second invention, a light source for irradiating the transparent original and a sensor that receives transmitted light are separately driven. Align.

What if you just use the functions that 9 originally has without setting up a complicated mechanism? #Able to perform well.

[Brief explanation of drawings]

FIG. 1 is a diagram showing the appearance of the device of the present invention. FIG. 2 is a diagram showing the configuration of an embodiment of the present invention. FIG. 3 is a diagram showing the system configuration of the apparatus of the present invention, and FIG. 4 is a diagram showing the operational flow for reading a reflective original flatbed. FIG. 5 is a diagram showing the operational flow of conveying and reading a reflective original. FIG. 6 is a diagram showing the operational flow of reading a transparent original. FIG. 7 is a diagram showing a configuration example (part 1) of a light amount equalization system. FIG. 8 is a diagram showing a configuration example (part 2) of the light amount equalization system. FIG. 9 is a diagram showing an example of a positioning method. FIG. 10 is a diagram showing the operation flow (part 1) when the power is turned on. FIG. 11 is a diagram showing the operation flow (part 2) when the power is turned on. FIG. 12 is a diagram showing the flow of transparent original reading operation. FIG. 13 is a diagram showing a conventional image scanner device for reflective originals. FIG. 14 is a diagram showing a conventional image scanner device for transparent originals. In Fig. 2, 11: Housing 12: Transparent unit that also serves as a document cover 13: Automatic paper feeder 14: Document feed table 15: Sensor unit 168 Reflective document lamp 17: Sensor 18; Document mounting table 19: Document 20; Transparent Document lamp 21: Light diffusion plate 22: Feed roller 23: Separation roller 24: Ejection roller

Claims (3)

[Claims] (1) A housing with a document tray on its surface, a document cover to hold down the original placed on the document tray, and an automatic paper feeder to automatically transport the document onto the document tray. A sensor unit including a reflective original light source and a sensor is arranged below the original placing table inside the housing, and a transparent original light source is arranged at a position corresponding to the original placing table inside the original cover. An image scanner device characterized by: (2) A reflective original light source dimmer circuit for adjusting the light intensity of the reflective original light source, a transparent original light source dimmer circuit for adjusting the light intensity of the transparent original light source, and a reflective original light source dimmer circuit for adjusting the light intensity of the reflective original light source. controlling the reflective original light source dimmer circuit so that the outputs of the monitoring means, the means for monitoring the light amount of the transparent original light source, and the light amount of the reflective original light source are equal to the reference value; The image according to claim 1, further comprising a control circuit for controlling a light source dimmer circuit for transparent originals so that the output of the means for monitoring the light amount of the light source for transparent originals is equal to a reference value. scanner device. (3) In the alignment method of the light source and the sensor when reading a transparent original with the image scanner device according to claim 1 or claim 2, the step of returning the light source and the sensor to respective predetermined home positions when the power is turned on; The light source is turned on at its home position and fixed at that position, while the sensor is moved and the sensor output value is compared with a predetermined slice level, at the same time the number of pulses from the sensor home position is counted. The process of writing the number of pulses from the sensor home position to the register when the sensor output value becomes larger than the slice level, and the process of moving the sensor further until the sensor output exceeds the peak and becomes smaller than the slice level. The process of writing the number of pulses from the sensor home position to the register at the point when the sensor output value becomes larger than the slice level The number of pulses from the sensor home position, which represents the position of the light source, is calculated by dividing the sum of the number of pulses from the sensor home position at the time when the sensor output value becomes smaller than the slice level by 2. Read preparation is completed through the process of writing the sensor to the register and returning the sensor to the sensor home position.・It is characterized by going through the process of moving by the number of pulses from the home position and temporarily stopping at that position, and the process of starting reading the transparent original while moving the light source and sensor at the same speed at the same time. A method for aligning the light source and sensor in a transparent document reading device.