JP2010187190A - Image reading apparatus, image reading and recording device, and program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an image reading apparatus for suppressing the occurrence of incomplete reading of images recorded in an original other than an original in a fixed form while suppressing power consumption during image reading in comparison with the case of not having this configuration, and to provide an image reading and recording device, and a program. <P>SOLUTION: When an image reading unit 12 reads images recorded in an original placed on a platen glass, a CPU 70 estimates which the original placed on the platen glass in accordance with a predetermined reference position is of a plurality of originals of fixed forms having different sizes, and controls a light irradiation device so as to emit light to an irradiation area which is larger than the size of the estimated original of a fixed form and narrower than the maximum irradiatable area of light by the light irradiation device. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an image reading apparatus, an image reading apparatus, and a program.

  Patent Document 1 discloses a document table on which a document is placed, a light source that emits light to the document placed on the document table, a conversion element that converts reflected light from the illuminated document into an image signal, and a document A document reading apparatus is disclosed that includes a determining unit that determines a portion of the table on which no document is placed, and a light-off unit that turns off the light source corresponding to the portion on which the document is not placed.

JP 2005-354205 A

  An object of the present invention is to provide an image reading apparatus that suppresses the occurrence of unread reading of an image recorded on a document other than a standard document while suppressing power consumption at the time of image reading, compared to a case without this configuration. An image reading and recording apparatus and a program are provided.

  In order to achieve the above object, an image reading apparatus according to claim 1 is translucent and has an original platen on which an original is placed, and an optical document passing through the original table with respect to the original placed on the original table. And reading an image recorded on the original by receiving reflected light from the original when the original is irradiated with light by the irradiation means. Reading means; estimation means for estimating which one of a plurality of standard originals having different sizes is placed on the original plate in accordance with a predetermined reference position; and When reading an image recorded on a document placed on a document table, light is irradiated to an irradiation area that is larger than the size of the standard document estimated by the estimation means and narrower than the maximum light irradiable area by the irradiation means. Is irradiated Is configured to include a control means for controlling said irradiating means so that the.

  According to a second aspect of the present invention, there is provided the image reading apparatus according to the first aspect of the present invention, wherein the irradiating means is movable in the sub-scanning direction and is provided with a plurality of light sources arranged in parallel in the main scanning direction. Thus, the control means controls the irradiation area to be irradiated with light by controlling the number of lighting of the light source.

  On the other hand, in order to achieve the above object, the image reading and recording apparatus according to claim 3 is translucent and has an original platen on which the original is placed and the original on the original placed on the original table. Irradiation means capable of irradiating light through a table and adjusting an irradiation area, and reflected light from the original when the irradiation means irradiates light on the original is recorded on the original. A reading unit that reads an image; an estimation unit that estimates whether a document placed on the document table in accordance with a predetermined reference position is a plurality of standard documents having different sizes; and the document Acquisition of size information indicating a size of a shielding member that shields the table and reflects irradiation light from the irradiation unit in a shielded state, and a recording medium that records an image read by the reading unit Means and before While the acquisition unit acquires the size information, the reading unit reads an image recorded on the document placed on the document table, and the read image is recorded on the recording medium without being reduced. If the document table on which the document is placed is shielded by the shielding member, the region including the region corresponding to the size of the recording medium indicated by the size information acquired by the acquisition unit The irradiation unit is controlled so that light is irradiated, and the reading unit reads an image recorded on the document placed on the document table in a state where the acquisition unit does not acquire the size information. In this case, the irradiation unit is controlled so that light is irradiated to an irradiation area that is larger than the size of the standard document estimated by the estimation unit and narrower than the maximum light irradiable region by the irradiation unit. It is configured to include a control means.

  According to a fourth aspect of the present invention, there is provided the image reading and recording apparatus according to the third aspect of the invention, in which the irradiation unit is based on the estimation result of the estimation unit rather than the control of the irradiation unit based on the acquisition result of the acquisition unit. And a receiving unit that receives priority information indicating that control is given priority. The control unit receives the priority information by the receiving unit, and the reading unit is placed on the document table. When reading the image recorded on the original, it is wider than the size of the standard original estimated by the estimation means, regardless of whether the acquisition means has acquired the size information, and The irradiation unit is controlled so that light is irradiated to an irradiation region narrower than the maximum light irradiation possible region by the irradiation unit.

  On the other hand, in order to achieve the above object, a program according to claim 5 is a program that allows a computer to transmit a document that is translucent and placed on a document table on which a document is placed in a predetermined reference position. An estimation means for estimating which one of a plurality of standard documents of different sizes, and a document placed on the document table are irradiated with light through the document table, and an irradiation area can be adjusted. Reading means for reading an image recorded on the original by receiving reflected light from the original when the original is irradiated with light by the irradiation means is recorded on the original placed on the original table. When reading an image, the irradiating means is arranged so that light is irradiated to an irradiation area that is larger than the size of the standard document estimated by the estimating means and narrower than the maximum light irradiable area by the irradiating means. Is intended to function as control means Gosuru.

  According to a sixth aspect of the present invention, there is provided a program for causing a computer to function as control means constituting the image reading apparatus according to the second aspect.

  On the other hand, in order to achieve the above object, the program according to claim 7 is a program that allows a computer to transmit a document that is translucent and placed on a document table on which a document is placed at a predetermined reference position. , An estimation means for estimating which of a plurality of standard originals of different sizes, and an irradiation that irradiates light through the original table to the original placed on the original table and whose irradiation area is adjustable The size of the recording medium for recording the image read by the reading means for reading the image recorded on the original by receiving the reflected light from the original when the means irradiates the original with light. Acquisition means for acquiring size information, and in a state where the acquisition means acquires the size information, the reading means reads and reads an image recorded on a document placed on the document table. When the recorded image is recorded on the recording medium without being reduced, the document table on which the document is placed shields the document table and shields the irradiation light from the irradiation unit in a shielded state. The irradiation unit is controlled so that light is irradiated to a region including a region corresponding to the size of the recording medium indicated by the size information acquired by the acquisition unit while being shielded by the member, and the acquisition is performed. When the reading unit reads an image recorded on a document placed on the document table in a state where the unit has not acquired the size information, the size of the standard document estimated by the estimation unit is determined. And a function for controlling the irradiating means to irradiate light to an irradiation area narrower than the maximum irradiable area of the light by the irradiating means.

  According to an eighth aspect of the present invention, there is provided a program for causing a computer to function as an accepting unit and a control unit constituting the image reading and recording apparatus according to the fourth aspect.

  According to the first and fifth aspects of the invention, compared to the case where the present configuration is not provided, occurrence of unread reading of an image recorded on a document other than a standard document while suppressing power consumption at the time of image reading. The effect of suppressing is obtained.

  According to the invention concerning Claim 2 and Claim 6, compared with the case where an irradiation means is not comprised by the several light source, the effect that the change of the irradiation area of light can be performed easily is acquired.

  According to the third and seventh aspects of the invention, compared to the case where the present configuration is not provided, occurrence of unread reading of an image recorded on a document other than a standard document while suppressing power consumption during image reading. And the effect of making it difficult to record the outside of the document area black on the recording medium.

  According to the fourth and eighth aspects of the invention, an effect that the convenience of the user is improved as compared with the case where the present configuration is not provided can be obtained.

1 is a perspective view illustrating an appearance of an image reading and recording apparatus according to an embodiment. It is sectional drawing which showed typically the structure of the image recording engine part which concerns on embodiment. 2A and 2B are diagrams illustrating a configuration of an image reading unit according to the embodiment, in which FIG. 1A is a perspective view of the image reading unit according to the embodiment, and FIG. 2B schematically illustrates the image reading unit according to the embodiment. FIG. 1 is a block diagram illustrating a main configuration of an electric system of an image reading and recording apparatus according to an embodiment. It is a flowchart which shows the flow of a process of the image reading recording process program which concerns on embodiment.

  Hereinafter, an example of an embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 shows an image reading and recording apparatus 10 according to the present embodiment. As shown in FIG. 1, the image reading and recording apparatus 10 includes an image reading unit 12 that reads an image recorded on a document, and an image recording unit 14 that is disposed below the image reading unit 12. The image recording unit 14 performs image recording based on image information indicating the image read by the image reading unit 12. Further, on the image reading unit 12, a document conveying device 16 that also serves as an opening / closing lid of the image reading unit 12 is provided. The document conveying device 16 is rotatable about a hinge member (not shown) in a direction approaching or separating from the image reading unit 12. In the document conveying device 16, a surface facing an after-mentioned platen glass 22 of the image reading unit 12 is a white surface having a uniform reflectance, and the platen glass 22 is shielded by the white surface. When rotated in a direction away from the image reading unit 12, the platen glass 22 is exposed.

  The document feeder 16 is provided with a platform 18 on which documents to be copied are placed (in the case of a plurality of sheets). In addition, a sheet discharge receiver 20 is provided below the table 18 for discharging a document sent from the table 18 and read. Here, in the document conveying device 16 and the image reading unit 12, the document placed on the table 18 (if a plurality of sheets are stacked, the uppermost document) is sent to a document reversing unit (not shown), The document is read by passing through the reading area on the platen glass 22 (see FIG. 3A) of the image reading unit 12 while being inverted and being discharged onto the paper discharge receiver 20.

  The image recording unit 14 includes a paper feed box 26 arranged in three stages at the bottom, and an image recording engine unit 120 arranged at the top of the paper feed box 26 for recording images. The image reading unit 12 includes a user interface 24 including a display panel on which various types of information are displayed and an operation unit (such as a numeric keypad and a start button) for a user to input a document reading or copying instruction. It is arranged. Here, when the size of the recording paper is designated by the image reading unit 12, the recording paper is selectively pulled out from the paper feeding box 26 one by one by a paper feeding device (not shown) and conveyed to the image recording engine unit 120. It has come to be.

  FIG. 2 shows an image recording engine unit 120 according to the present embodiment. As shown in the figure, in the image recording engine unit 120, an exposure device 124 is fixed to a casing 122 that constitutes a main body, and operations of each unit of the image reading and recording device 10 are performed at positions adjacent to the exposure device 124. A control unit 42 for controlling is provided.

  The exposure device 124 scans a light beam emitted from a light source (not shown) with a rotating polygonal mirror (polygon mirror) based on image information indicating an image read by the image reading unit 12, and a plurality of optical components such as a reflection mirror. Light beams 126Y, 126M, 126C, and 126K corresponding to the yellow (Y), magenta (M), cyan (C), and black (K) toners are reflected by the components. The light beams 126Y, 126M, 126C, and 126K are guided to the corresponding photoreceptors 128Y, 128M, 128C, and 128K, respectively.

  The above-described paper feed box 26 is disposed below the image recording engine unit 120, and above the paper feed box 26, a pair of alignment rolls that adjust the position of the leading end of the recording paper P as a recording medium. 129 is provided. An image recording unit 130 is provided in the center of the image recording engine unit 120. The image recording unit 130 includes the above-described four photoconductors 128Y, 128M, 128C, and 128K, which are arranged in a vertical line.

  Charging rollers 132Y, 132M, 132C, and 132K for charging the surfaces of the photosensitive members 128Y, 128M, 128C, and 128K are provided on the upstream side in the rotation direction of the photosensitive members 128Y, 128M, 128C, and 128K. Further, on the downstream side in the rotation direction of the photoconductors 128Y, 128M, 128C, and 128K, developing units 134Y, 134M, and 134C that develop the Y, M, C, and K toners on the photoconductors 128Y, 128M, 128C, and 128K, respectively. , 134K are provided.

  On the other hand, the first intermediate transfer member 136 is in contact with the photoconductors 128Y and 128M, and the second intermediate transfer member 138 is in contact with the photoconductors 128C and 128K. The third intermediate transfer member 140 is in contact with the first intermediate transfer member 136 and the second intermediate transfer member 138. A transfer roll 142 is provided at a position facing the third intermediate transfer body 140. The transfer roll 142 transfers the toner image on the third intermediate transfer body 140 to the recording paper P when the recording paper P is conveyed between the third intermediate transfer body 140 and the transfer roll 142.

  A fixing device 146 is provided downstream of the paper transport path 144 through which the recording paper P is transported. The fixing device 146 includes a fixing roll 148 and a pressure roll 150, and heats and presses the recording paper P to fix the toner image on the recording paper P. The recording paper P on which the toner image is fixed is discharged to a paper discharge receiver 28 provided on the upper part of the image forming unit 120 by a paper conveyance roll 152.

  Next, image recording of the image recording engine unit 120 will be described.

  When the image recording to the image recording engine unit 120 is instructed, the surfaces of the photoconductors 128Y, 128M, 128C, and 128K are uniformly charged by the charging rollers 132Y, 132M, 132C, and 132K. Light beams 126Y, 126M, 126C, and 126K corresponding to the output image are emitted from the exposure device 124 to the surfaces of the charged photosensitive members 128Y, 128M, 128C, and 128K, and the respective surfaces of the photosensitive members 128Y, 128M, 128C, and 128K are irradiated. Then, an electrostatic latent image corresponding to each color separation image is formed. Developers 134Y, 134M, 134C, and 134K selectively apply toners of respective colors, that is, Y, M, C, and K, to the electrostatic latent image, and Y on the photoreceptors 128Y, 128M, 128C, and 128K. , M, C, and K toner images are formed.

  Thereafter, a magenta toner image is primarily transferred from the magenta photosensitive member 128 </ b> M to the first intermediate transfer member 136. Further, a yellow toner image is primarily transferred from the yellow photoreceptor 128 </ b> Y to the first intermediate transfer member 136, and is superimposed on the magenta toner image on the first intermediate transfer member 136.

  On the other hand, similarly, a black toner image is primarily transferred from the black photosensitive member 128K to the second intermediate transfer member 138. Further, a cyan toner image is primarily transferred from the cyan photoconductor 128 </ b> C to the second intermediate transfer member 138, and is superimposed on the black toner image on the second intermediate transfer member 138.

  The magenta and yellow toner images primarily transferred to the first intermediate transfer member 136 are secondarily transferred to the third intermediate transfer member 140. On the other hand, the black and cyan toner images primarily transferred to the second intermediate transfer member 138 are also secondarily transferred to the third intermediate transfer member 140. Here, the magenta and yellow toner images that have been secondarily transferred first and the cyan and black toner images are superimposed, and a color toner image is formed on the third intermediate transfer body 140.

  The secondary transferred color toner image reaches the nip portion between the third intermediate transfer body 140 and the transfer roll 142. In synchronization with the timing, the recording paper P is conveyed from the alignment roll 129 to the nip portion, and the color toner image is thirdarily transferred (final transfer) onto the recording paper P.

  Thereafter, the recording paper P is sent to the fixing device 146 and passes through the nip portion between the fixing roll 148 and the pressure roll 150. At that time, the color toner image is fixed on the recording paper P by the action of heat and pressure applied from the fixing roll 148 and the pressure roll 150. After fixing, the recording paper P is discharged to the paper discharge receiver 28 by the paper transport roll 152, and the color image formation on the recording paper P is completed.

  FIG. 3 shows the image reading unit 12 according to the present embodiment. As shown in FIGS. 4A and 4B, a substantially rectangular opening (in the present embodiment, an opening larger than an A3 size document) is formed on the upper surface of the case 13 constituting the main body of the image reading unit 12. A platen glass 22 on which the document 31 is placed is fitted into the opening. When a bookbinding document or the like that cannot use the table 18 of the document conveying device 16 is directly placed on the platen glass 22 for copying, the document conveying device 16 is opened upward. In the image reading unit 12 according to the present embodiment, a colorless and transparent glass plate is applied as the platen glass 22. However, the present invention is not limited to this, and any platen having translucency may be used.

  A scanning unit 32 for reading the document 31 is disposed in the internal space of the apparatus below the platen glass 22. The scanning unit 32 includes a plurality of LEDs (Light Emitting Diodes) 34 a arranged in a grid pattern that emits light toward the document 31 with the direction from the front to the back side of the image reading and recording apparatus 10 as the longitudinal direction (main scanning direction). The configured light irradiation device 34, the reflection unit 36 including a plurality of mirrors that reflect the light L reflected by the document 31 when the light irradiation device 34 irradiates the document 31 with light, and the reflection unit 36. A condensing unit 38 comprising a lens that condenses the reflected light L, and a CCD (Charge Coupled Device) line sensor that receives (images) the light L collected by the condensing unit 38 and outputs an electrical signal. 40. The CCD line sensor 40 is connected to the aforementioned control unit 42 provided in the main body of the image reading and recording apparatus 10. The reason why the light L is folded back by the plurality of mirrors in the reflecting portion 36 is that a predetermined optical path length is required for image formation on the CCD line sensor 40. Note that the scanning range of the light irradiation device 34 according to the present embodiment is wider than the A3 size original 31.

  Here, the scanning unit 32 moves in a direction orthogonal to the main scanning direction (sub-scanning direction: arrow X), so that the light from the light irradiation device 34 is linearly formed on the image recorded on the document 31. Irradiated. Subsequently, the reflected light from the document 31 is received by the CCD line sensor 40 via the reflecting portion 36 and the condensing portion 38. The CCD line sensor 40 outputs an electrical signal corresponding to the image density to the control unit 42 by photoelectric conversion. Then, the control unit 42 detects the image density of the irradiation area based on the obtained electric signal. In this way, the image of the document 31 is read.

  On the other hand, around the platen glass 22, a document set guide 30 having a substantially rectangular frame is provided. The document set guide 30 has a slightly convex step from the platen glass 22, and the document 31 is easily positioned by aligning the corners of the document 31 so as to contact the step of the document set guide 30. . On the upper surface of the document set guide 30, a registration mark (not shown) is used as a mark when the corner of the document 31 is aligned with the corner of the document set guide 30, and the standard size is obtained by aligning the corner with the alignment mark. In the present embodiment, a document size label (not shown) indicating the position of the end of the document 31 when the document 31 of B5, A4, B4, A3) is placed on the platen glass 22 is provided. . Hereinafter, the standard-size document 31 is referred to as a “standard document”.

  Fixing portions 44A and 44B to which hinge members (not shown) provided on the bottom surface side of the document conveying device 16 are fixed around the document setting guide 30 on the back side (upper side in the drawing) of the image reading and recording apparatus 10. Is provided.

  FIG. 4 is a block diagram showing the main configuration of the electrical system of the image reading and recording apparatus 10 according to the present embodiment. As shown in the figure, the image reading and recording apparatus 10 includes a CPU (Central Processing Unit) 70, a ROM (Read Only Memory) 72, a RAM (Random Access Memory) 74, an NVM (Non Volatile Memory) 76, and an external interface 80. It is comprised including. The control unit 42 described above includes a CPU 70, a ROM 72, a RAM 74, an NVM 76, and an external interface 80.

  The CPU 70 controls the entire operation of the image reading and recording apparatus 10. The ROM 72 functions as a storage unit that stores in advance a control program for controlling the operation of the image reading and recording apparatus 10, an image reading and recording processing program to be described later, various parameters, and the like. The RAM 74 is used as a work area when executing various programs. The NVM 76 stores various types of information that must be retained even when the power switch of the apparatus is turned off. The external interface 80 is connected to an external device such as a personal computer, and transmits / receives various information to / from the external device.

  The CPU 70, ROM 72, RAM 74, NVM 76, and external interface 80 are connected to each other via a system bus BUS. Accordingly, the CPU 70 performs access to the ROM 72, RAM 74, and NVM 76, transmission of various information to the external device via the external interface 80, and reception of various information from the external device via the external interface 80. .

  The image reading unit 12, the document conveying device 16, the image recording engine unit 120, and the user interface 24 described above are also connected to the system BUS. Therefore, the CPU 70 controls the operation of the image reading unit 12, obtains image information indicating the image read by the image reading unit 12, controls the operation of the document conveying device 16, and operates the image recording engine unit 120. Control, display of various types of information on the user interface 24, and grasping of user operation instruction contents for the user interface 24 are performed.

  Next, as an operation of the present embodiment, the corner is aligned with the alignment mark on the peripheral edge of the platen glass 22 and the corner is aligned so as to contact the step of the document setting guide 30, so that the document is at a predetermined reference position. When the platen glass 22 on which the image 31 is placed is shielded by the document conveying device 16 and is instructed to copy an image recorded on the document 31 through the user interface 24, the ROM 72 stores the image in advance. An image reading and recording process realized by the CPU 70 executing the read image reading and recording program will be described with reference to FIG. FIG. 5 is a flowchart showing the flow of processing of the image reading and recording processing program. Here, in order to avoid complications, it is assumed that the document 31 placed on the platen glass 22 is estimated by the image reading unit 12 and the CPU 70 as a standard document of B5, A4, B4, and A3. To do.

  In step 200 in the figure, size information indicating the size (here, B5, A4, B4, A3) of the recording paper P on which an image is to be recorded by the image recording engine unit 120 is already received by the user interface. If the determination is affirmative, the process proceeds to step 214 without executing steps 202 and 204. On the other hand, if the determination is negative, the process proceeds to step 202.

  In step 202, a screen prompting the user to specify the size of the recording paper P on which the image is to be recorded is displayed on the display panel of the user interface 24, and the process proceeds to step 204.

  In step 204, it is determined whether or not the size of the recording paper P on which an image is to be recorded is specified via the user interface 24. If the determination is affirmative, the recording paper P of the specified recording paper P is determined. Size information indicating the size is acquired and the process proceeds to step 214. On the other hand, if a negative determination is made, the process proceeds to step 206.

  In the image reading and recording apparatus 10 according to the present embodiment, the CPU 70 acquires size information indicating the size of the recording paper P received via the user interface 24. The CPU 70 may acquire size information obtained by detecting the size of the recording paper P with a sensor when the recording paper P is sent from the paper supply box 26 to the image recording engine unit 120. As described above, the form in which the CPU 70 acquires the size information indicating the size of the recording sheet P on which the image is to be recorded may be changed according to the specification and application of the image reading and recording apparatus 10.

  In step 206, it is determined whether or not a predetermined time (here, 15 seconds) has elapsed since the execution of the processing of step 204. If the determination is negative, the process returns to step 204, but affirmative If it is determined, the process proceeds to step 208.

  In step 208, estimation of which of the standard documents B5, A4, B4, and A3 the size of the document 31 placed on the platen glass 22 is started. Do.

  In the next step 212, the light irradiation device 34 starts to irradiate light to an area that is slightly larger than the size of the standard document estimated in step 208, and the process proceeds to step 216. Note that in the image reading and recording apparatus 10 according to the present embodiment, the above-mentioned “one size larger area” is an intermediate area between the standard document estimated in step 208 and a standard document that is one step larger than the standard document (however, In the case where the standard document estimated in step 208 is A3, an area that is larger than the size of the standard document of A3 and smaller than the maximum light irradiable area of the light irradiation device 34) is applied. When the standard document estimated in step 208 is B5, an intermediate region between B5 and A4 is a light irradiation region by the light irradiation device 34. However, the present invention is not limited to this, for example, the area of the standard document that is one step larger than the standard document estimated in step 208 (however, if the standard document estimated in step 208 is A3, the light irradiation device 34 emits light). The maximum irradiable area) may be applied as the “one-larger area”. As described above, in this step 212, the light irradiation device 34 is configured so that light is irradiated to a region that is larger than the size of the standard document estimated in step 208 and smaller than the maximum light irradiation possible region of the light irradiation device 34. Can be controlled.

  In step 214, the light irradiating device 34 is caused to irradiate the platen glass 22 with light only in a region corresponding to the size of the recording paper P designated via the user interface 24.

  In the next step 216, the image reading unit 12 is started to read the image recorded on the document 31 placed on the platen glass 22, and in the next step 218, the image reading unit 12 reads the image. Wait for the end of reading.

  In the next step 220, the light irradiation device 34 is controlled to turn off the LED 34 a turned on in the above step 212 or 214, and in the next step 222, the above step is performed on the image recording engine unit 120. After the image read by the image reading unit 12 in step 216 is recorded on the recording paper P, the image reading and recording processing program is terminated.

  As mentioned above, although this invention was demonstrated using the said embodiment, the technical scope of this invention is not limited to the range as described in the said embodiment. Various changes or improvements may be added to the above-described embodiment without departing from the gist of the invention, and forms to which the changes or improvements are added are also included in the technical scope of the present invention.

  Moreover, the said embodiment does not limit the invention described in the claim, and all the combinations of the characteristics demonstrated in the said embodiment are essential for the solution means of invention. Is not limited. The above-described embodiments include various stages of the invention, and various inventions are extracted by combinations according to situations in a plurality of disclosed constituent requirements. Even if some constituent requirements are deleted from all the constituent requirements shown in the above-described embodiment, as long as an effect is obtained, a configuration from which these some constituent requirements are deleted is extracted as an invention.

  For example, in the above-described embodiment, the light irradiation device 34 is configured by a plurality of LEDs 34a. However, the configuration is not limited thereto, and for example, the light irradiation device 34 may be configured by a plurality of fluorescent lamps. As described above, the light irradiation device 34 may be configured by a plurality of light sources that are arranged in parallel in the main scanning direction and can be turned on independently of each other.

  Further, in the above embodiment, when reading the image recorded on the document 31 placed on the platen glass 22 in a state where the platen glass 22 is shielded by the document conveying device 16, it is slightly larger than the estimated standard document. Although the area is irradiated with light, the present invention is not limited to this, and when reading an image recorded on the document 31 placed on the platen glass 22 with the platen glass 22 exposed, the estimated standard document is used. In this case, when this configuration is not provided (for example, when all the light sources provided in the light irradiation device 34 are turned on at the time of image reading). Compared to a document of a size other than a document of a predetermined size (for example, a document larger than an estimated standard document) 31 along with generation of the read left) end is suppressed, light irradiated from the light irradiation device 34 is discomfort to the user by thus the eyes of the user is reduced.

  Further, in the above embodiment, when the CPU 70 has acquired size information indicating the size of the recording paper P scheduled to be image-recorded, it corresponds to the size of the recording paper P indicated by the acquired size information. When the CPU 70 has not acquired size information indicating the size of the recording paper P to be image-recorded, the size of the document 31 placed on the platen glass 22 is estimated. Although the light irradiation area is controlled according to the estimated result, the present invention is not limited to this. For example, the document placed on the platen glass 22 is more controlled than the irradiation area control according to the size of the designated recording paper P. When the priority information indicating that priority is given to the control of the irradiation area according to the estimated result is received by the user interface 24, the CPU 70 acquires the size information. Regardless of whether to estimate the size of the document 31 placed on the platen glass 22, according to the estimated result may be to control the light irradiation region.

  In the above-described embodiment, the execution example of the image reading and recording process at the time of performing the same size copying is described. However, the present invention is not limited to this, and the same effect can be obtained when the enlarged copying is performed. As described above, in the case of performing copying other than reduced copying, the same effect as that obtained by executing the image reading and recording process can be obtained.

  Further, in the above embodiment, the light irradiation device 34 moving in the sub-scanning direction irradiates the designated area of the platen glass 22. You may irradiate the designated area | region of the glass 22 with light. In this case, the light source unit includes a plurality of light sources that can be lit independently.

  In addition, the configuration of the image reading and recording apparatus 10 described in the above embodiment (see FIGS. 1 to 4) is merely an example, and it is needless to say that the configuration may be changed according to the situation without departing from the gist. Yes.

  In the above embodiment, the document conveying device 16 is applied as a shielding member that shields the platen glass 12 of the image reading unit 12. However, if the shielding member shields the platen glass 12 with a substantially white surface, the document conveying function is provided. Needless to say, it may be one that is not provided.

  The processing flow of the image reading / recording processing program described in the above embodiment (see FIG. 5) is also an example, and unnecessary steps are deleted or new steps are added within a range not departing from the gist. Needless to say, the processing order may be changed.

DESCRIPTION OF SYMBOLS 10 Image reading and recording apparatus 12 Image reading part (reading means)
16 Document feeder (shielding member)
22 Platen glass (original platen)
24 User interface (reception means)
31 Document 34 Light irradiation device (irradiation means)
34a LED (light source)
70 CPU (estimation means, acquisition means, control means)

Claims (8)

A platen that is translucent and on which the document is placed;
Irradiating means for irradiating light on the document placed on the document table through the document table and adjusting an irradiation area;
Reading means for reading an image recorded on the original by receiving reflected light from the original when the irradiation means irradiates the original with light;
Estimating means for estimating which one of a plurality of standard documents of different sizes is placed on the document table in accordance with a predetermined reference position;
When the reading unit reads an image recorded on the document placed on the document table, the reading unit is wider than the size of the standard document estimated by the estimation unit and larger than the maximum light irradiable area by the irradiation unit. Control means for controlling the irradiation means so that light is irradiated to a narrow irradiation area;
An image reading apparatus. The irradiation unit is movable in the sub-scanning direction and includes a plurality of light sources arranged in parallel in the main scanning direction.
The image reading apparatus according to claim 1, wherein the control unit performs control so that light is emitted to the irradiation region by controlling the number of lighting of the light sources. A platen that is translucent and on which the document is placed;
Irradiating means for irradiating light on the document placed on the document table through the document table and adjusting an irradiation area;
Reading means for reading an image recorded on the original by receiving reflected light from the original when the irradiation means irradiates the original with light;
Estimating means for estimating which one of a plurality of standard documents of different sizes is placed on the document table in accordance with a predetermined reference position;
A shielding member that shields the document table and reflects light emitted from the irradiation means in a shielded state;
Obtaining means for obtaining size information indicating a size of a recording medium for recording an image read by the reading means;
In a state where the acquisition unit acquires the size information, the reading unit reads an image recorded on a document placed on the document table, and the read image is recorded on a recording medium without being reduced. In the case where the document is placed, the area including the area corresponding to the size of the recording medium indicated by the size information acquired by the acquisition means in a state where the document table on which the document is placed is shielded by the shielding member The image is recorded on a document placed on the document table in a state where the irradiation unit is controlled so that the light is irradiated and the acquisition unit does not acquire the size information. In the case of reading, the irradiation unit is controlled so that light is irradiated to an irradiation region that is larger than the size of the standard document estimated by the estimation unit and narrower than the maximum light irradiation region by the irradiation unit. And control means that,
An image reading and recording apparatus. Receiving means for receiving priority information indicating that the control of the irradiation unit based on the estimation result of the estimation unit is prioritized over the control of the irradiation unit based on the acquisition result of the acquisition unit;
When the priority information is received by the receiving unit, and the reading unit reads an image recorded on a document placed on the document table, the control unit is configured to acquire the acquisition unit. Regardless of whether the size information is acquired or not, light is irradiated to an irradiation area that is larger than the size of the standard document estimated by the estimation means and narrower than the maximum irradiation possible area of the light by the irradiation means. The image reading and recording apparatus according to claim 3, wherein the irradiation unit is controlled so as to be irradiated. Computer
Estimating means for estimating which one of a plurality of standard originals having different sizes is a light-transmitting original placed on a platen on which a document is placed, in accordance with a predetermined reference position; In addition, the original placed on the original table is irradiated with light through the original table, and reflected light from the original when the original is irradiated with light by an irradiation means whose irradiation area can be adjusted is received. Thus, when the reading means for reading the image recorded on the original reads the image recorded on the original placed on the original table, the reading means is wider than the size of the standard original estimated by the estimating means, and The program for functioning as a control means which controls the said irradiation means so that light may be irradiated to the irradiation area narrower than the maximum light irradiation possible area | region by an irradiation means.   A program for causing a computer to function as control means constituting the image reading apparatus according to claim 2. Computer
Estimating means for estimating which one of a plurality of standard originals having different sizes is a light-transmitting original placed on a platen on which a document is placed, in accordance with a predetermined reference position; Irradiating light through the original table with respect to the original placed on the original table, and receiving reflected light from the original when the original is irradiated with light by an irradiation means whose irradiation area can be adjusted. Obtaining means for obtaining size information indicating the size of a recording medium for recording the image read by the reading means for reading the image recorded on the original, and the obtaining means obtains the size information. When the reading means reads an image recorded on a document placed on the document table and the read image is recorded on a recording medium without being reduced, the document placed on the document The platen is The size of the recording medium indicated by the size information acquired by the acquisition means while being shielded by the shielding member that shields the document table and reflects the irradiation light from the irradiation means in the shielded state. A document on which the reading unit is placed on the document table in a state where the irradiation unit is controlled so that light is irradiated to a region including a region corresponding to the above and the acquisition unit does not acquire the size information When reading an image recorded on the image, light is irradiated to an irradiation area that is larger than the size of the standard document estimated by the estimation means and narrower than the maximum light irradiable area by the irradiation means. A program for causing the control unit to function as a control unit for controlling the irradiation unit.   A program for causing a computer to function as receiving means and control means constituting the image reading and recording apparatus according to claim 4.

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